Quartz
Cuarţ, Cuarzo, Křemen, Kuarsa, Kuarza, Kuvars, Kvarc, Kvarcas, Kvarcs, Kvarts, Kvartsi, Kwarc,
Kwarts, Quartzo, Quarz, Quarzo,
Thạch anh, مرو, Χαλαζίας, 石英, 석영,
Кварц, ควอตซ์
Name: From the old Slavic word "kwardy" (hard)
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
⇐ Intro Page ⇐ Gemstones
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Formula Agate: SiO2
Achat, Achát, Agaat, Agat, Agata, Ágata, Agatas, Agate, Ahat, Ahāts, Ahhaat, Akaatti, Akik, Агат, 瑪瑙, メノウ, אגט, العقيق, โมรา Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): 2.6 - 2.65 Refractive index: 1.530 - 1.540 Cleavage: poor - indistinct Colors: Agates show insignificant colors by nature. They get attractive colors by dying with anorganic dyes or by chemical treatment: Red: Immersing in iron nitrate, then heating. Yellow: Immersing in hydrochloric acid, then heating. Black: Immersing in sugar solution, then sulphuric acid treatment. Green: Immersing in chrome salts (chromates) or nickel nitrate, then heating. Blue: Immersing in potassium ferrocyanide, then heating with iron sulfate. Luster: vitreous Fluorescence: different, depending on the ribbons. Pleochroism: - Largest Agate: several hundred pounds. Deposits: Australia, Brazil, China, Germany, India, Madagascar, Mexico, Uruguay, USA Name: from the old name "Achates" of a river in Sicily / Italy (todays name: Dirillo) |
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Agate Mineral
Origin: Waldhambach / Rhineland-Palatinate / Germany Photo by kind permission of © www.mineralroli.de |
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Agate Mineral
Origin: Rancho Coyamito / Ricardo Flores Magón / Chihuahua / Mexico Photo by kind permission of © www.achate.at |
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Agate Mineral
Origin: Rancho Aparejos / Ricardo Flores Magón / Chihuahua / Mexico Photo by kind permission of © www.achate.at |
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Agate Mineral
Size: 6.5 x 4.2 x 1.6 cm Origin: Gyöngyöstarján / Hungary Photo by kind permission of © www.mineraltivadar.hu |
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Agate Mineral
Size: 6.8 x 4.8 x 2.4 cm Origin: Gyöngyöstarján / Hungary Photo by kind permission of © www.mineraltivadar.hu |
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Agate Mineral
Origin: Burn Anne / Scotland / Great Britain Photo by kind permission of © www.achate.at |
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Agate Mineral
Size: 7.0 x 5.2 x 2.1 cm Origin: Gyöngyöstarján / Hungary Photo by kind permission of © www.mineraltivadar.hu |
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Agate Mineral
Size: 9 x 8 cm Origin: Eckenfels Mt. / Oppenau / Lierbachtal Valley / Schwarzwald (Black Forest) / Germany Photo by kind permission of © www.achate-schwarzwald.de |
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Agate "Fire Agate" Mineral
Size: 1.37 x 1.18 x 0.81 cm Weight: 9.70 ct Origin: Mexico Photo by kind permission of © www.palagems.com |
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Agate "Fire Agate"
Size: 2.78 x 1.1 cm Weight: 9.24 ct Origin: Slaughter Mt. / San Carlos Res. / Arizona / USA Photo by kind permission of © http://www.thegemtrader.com |
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Agate "Fire Agate"
Size: 1.39 x 1.06 cm Weight: 5.79 ct Origin: Mexico Photo by kind permission of © www.thegemtrader.com |
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Agate "Fire Agate"
Size: 1.1 x 0.8 x 0.2 cm Weight: 1.76 ct Origin: Calvillo / Aguascalientes / Mexico Photo by kind permission of © www.lucianabarbosa.com |
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Agate "Fire Agate"
Size: 1.93 x 1.02 x 0.71 cm Weight: 10.05 ct Origin: Mexico Photo by kind permission of © www.starruby.in |
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Agate
Size: 2.2 x 1.9 x 1.0 cm Origin: Botswana Photo by kind permission of © www.lucianabarbosa.com |
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Agate Mineral SW UV
Size: 2.1 x 2.0 x 0.7 cm Weight: 15.5 ct Origin: Montana / USA Photo by kind permission of © www.bestminerals.com |
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Agate Sculpture (Pair)
Size (Pair): 4.25 x 3.65 x 0.35 cm Weight (Pair): 33.55 ct Origin: Indonesia Photo by kind permission of © www.multicolour.com |
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Landscape Agates
Size: 2.0 x 1.5 cm Weight: 16.15 ct Origin: Brazil Photo by kind permission of © www.gemfrance.com |
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Landscape Agate Pendant
Size: 2.6 x 1.94 cm, 750/000 Gold Weight: 9.11 g Origin of the agate: Brazil Photo by kind permission of © www.gemfrance.com |
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Landscape Agate
Size: 5.5 x 4.3 x 0.5 cm Origin: Paulina Ridge / Oregon / USA Photo by kind permission of © www.lucianabarbosa.com |
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Landscape Agate
Size: 1.6 x 1.3 x 0.4 cm Weight: 7.70 ct Origin: Yellowstone River / Montana / USA Photo by kind permission of © www.lucianabarbosa.com |
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Agate Sculpture (Dragon)
Size: 25.1 x 20.9 x 5.2 cm Origin: China Photo by kind permission of © www.irocks.com |
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Agate Cameo
Cameo blue Agate Gold: 14K yellow gold Photo by kind permission of © www.portraitcameos.com |
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Agate Ring with Peruvian Opal
Weight: 10.50 g Diamonds: 44, total 0.25 ct Gold: 18K White gold Photo by kind permission of © Chrisgo-CG-Design |
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⇐ Intro Page ⇐ Gemstones
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Formula Amethyst: SiO2
Amatista, Amethist, Améthyste, Ametista, Ametistas, Ametisti, Ametists, Ametiszt, Ametüst, Ametyst, Аметист, 紫水晶, アメシスト, เขี้ยวหนุมาน, Αμέθυστος, אחלמה, ამეთვისტო Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.63 - 2.65 Refractive index: 1.543 - 1.554 Colors: violet Fluorescence: slightly greenish Pleochroism: slightly violet - grey-violet Largest Amethyst: ? Deposits: weltweit Name: from the Greek words "a -" (not), and "methystos" (intoxicated) |
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Amethyst Mineral
Origin: Hubei Prov. / China Photo by kind permission of © www.treasuremountainmining.com |
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Amethyst Ring
Amethyst: 3.5 ct, 1.1 x 0.9 cm Additional stones: Diamonds: 40, total 0.3 ct; Rubies: 2, total 0.04 ct Gold: 18K White gold Photo by kind permission of © www.davidwein.com |
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Amethyst Ring
Amethyst: 24.81 ct, 2.11 x 1.61 cm Diamonds: 54, total 0.62 ct Gold: 18K, 14.62 g Photo by kind permission of © www.davidwein.com |
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Amethyst Mineral
Size: 10.8 x 8.1 x 5.0 cm Origin: Uruguay Photo by kind permission of © www.aarockshop.com |
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Amethyst
Weight: 30.21 ct Origin: Hpa-An / Myanmar Photo by kind permission of © www.americanthai.com |
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Amethyst "Rose de France"
Size: 1.6 x 1.6 x 0.78 cm Weight: 10.25 ct Origin: Brazil Photo by kind permission of © www.edelsteine.at |
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Amethyst Ring
Amethyst: 6.0 ct, 1.40 x 0.90 cm Diamonds: 48, total 0.27 ct Gold: 14K Pink gold Photo by kind permission of © www.africagems.com |
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Amethyst Brooch
Diamonds: 4; total 0.10 ct Gold: 14K Yellow gold, 20.8 g Photo by kind permission of © Chrisgo-CG-Design |
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Amethyst Ring
Amethyst: 11.0 ct; 1.80 x 1.30 cm; Brazil Diamonds: 36; total 0.20 ct Gold: 14K White gold Photo by kind permission of © www.africagems.com |
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Amethyst bicolor Mineral
Size: 5.2 x 0.5 x 0.5 cm Origin: Brandberg Distr. / Erongo Region / Namibia Photo by kind permission of © www.irocks.com |
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Amethyst bicolor Mineral Pendant
Material: Gold Size: 3.3 x 1.5 x 1 cm Origin: Umba Valley / Tanzania Photo by kind permission of © www.wolfpiontek.de |
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Amethyst bicolor Ring
Amethyst: 9.61 ct, 1.35 x 1.10 cm, Brazil Diamonds: 65, total 0.96 ct Gold: 18K White gold Photo by kind permission of © www.africagems.com |
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Amethyst bicolor
Size: 1.9 x 1.3 x 0.4 cm Weight: 10.20 ct Origin: Espirito Santo / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Amethyst bicolor
Size: 1.79 x 1.29 cm Weight: 14.46 ct Origin: Brazil Photo by kind permission of © www.ridderborg.se |
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⇐ Intro Page ⇐ Gemstones
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Formula Ametrine: SiO2
Ametrin, Ametrinas, Amétrine, Ametrino, Ametrīns, Ametryn, 紫黃晶, 双色水晶 (又名紫黄晶), อเมทริน Mineral Class: Oxides Crystal System: Trigonal Mohs Scale: 7 Density (g/cm3): 2.66 Refractive index: 1.544 - 1.553 Colors: yellow, purple, violet Largest cutted gemstone: at least 202 ct Deposits: Anahí Mine / La Gaiba District / Sandoval Province / Santa Cruz Department / Bolivia Minas Gerais / Southeast Region / Brazil Ontario Gem Mine / Pearl Station / Thunder Bay District / Ontario / Canada Hyderabad District / Andhra Pradesh / India Name: a combination of the words "amethyst" and "citrine" |
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Ametrine Mineral
Size: 6.4 x 4.8 x 1.6 cm Origin: Anahi Mine / Santa Cruz / Bolivia Photo by kind permission of © www.lucianabarbosa.com |
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Ametrine Sculpture
Size: 3.0 x 2.7 x 1.2 cm Origin: Anahi Mine / Santa Cruz / Bolivia Photo by kind permission of © www.lucianabarbosa.com |
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Formula Aventurine Quartz: SiO2
Aventurien, Avantiurinas, Avanturīns, Aventuriini, Aventurin, Aventurina, Aventurine, 色東菱石, אוונטורין Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.544 - 1.563 Colors: green, golden brown Fluorescence: reddish Pleochroism: - Largest Aventurine Quartz: ? Deposits: India, Brazil, Russia Name: from the Italian words "a ventura" (by accident) |
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Formula Binghamite: SiO2 Fibrous chalcedony
with hematite, yellow goethite and crocidolite.
Binghamit, Binghamita Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): Refractive index: 1.564 - 1.660 Cleavage: Colors: golden yellow, red, brown Luster: chatoyant Fluorescence: - Pleochroism: - Largest Binghamite: ? Deposits: Cuyuna North Range / Crow Wing County / Minnesota / USA Discovery: 1936 Name: in honor of the Bill Bingham, who discovered it in 1936 |
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Binghamite Mineral
Origin: Cuyuna Iron Range / Crosby / Crow Wing County / Minnesota / USA Photo by kind permission of © www.cs.cmu.edu/ |
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Bloodstone ⇓ Heliotrope
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Formula Carnelian: SiO2
Cornaline, Karneol, 紅瑪瑙 Variety of: Chalcedony Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): 2.58 - 2.64 Refractive index: 1.53 - 1.54 Colors: reddish, brownish Fluorescence: blueish Pleochroism: - Largest Carnelian: ? Deposits: worldwide Name: from the Middle Age Latin word "corneolus" |
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Carnelian
Weight: 7.96 ct Origin: Balangoda / Sri Lanka Photo by kind permission of © www.wildfishgems.com |
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Carnelian
Size: 1,49 x 1,14 cm Weight: 5.30 ct Origin: Mozambique Photo by kind permission of © www.irocks.com |
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Carnelian bicolor
Size: 1.80 x 1.30 cm Weight: 13.37 ct Origin: Mozambique Photo by kind permission of © www.irocks.com |
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Carnelian bicolor
Weight: 5.23 ct Origin: Madagascar Photo by kind permission of © www.thegemtrader.com |
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⇐ Intro Page ⇐ Gemstones
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Formula Chalcedony: SiO2
Calcédoine, Calcedonia, Calcedônia, Calcedonio, Chalcedon, Chalcedón, Chalcedonas, Chalcedoon, Halcedons, Kalcedon, Kalsedon, Kalsedoni, Kaltsedon, Халцедон, 玉髓, カルセドニー, 옥수, כלקדון Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): 2.58 - 2.64 Refractive index: 1.564 - 1.660 Colors: whiteish, yellowish, reddish, blueish, violet Fluorescence: blueish Pleochroism: - Largest Chalcedony: ? Deposits: Brazil, Uruguay, India, Madagascar, Namibia Name: from the ancient town "Chalkedon" in Greece |
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Chalcedony Mineral
Size: 5.6 x 4.4 cm Origin: Hungary Photo by kind permission of © www.mineraltivadar.hu |
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Chalcedony Mineral
Size: 7.3 x 3.9 x 3 cm Origin: Blinkpan / Karas Reg. / Namibia Photo by kind permission of © www.irocks.com |
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Chalcedony
Size: 1.05 x 1.05 x 0.7 cm Weight: 3.45 ct Origin: Namibia Photo by kind permission of © JewelsRoughGems |
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Chalcedony "Paraiba-Chalcedony"
Size: 0.6 cm Weight: 0.70 ct Origin: Brazil Photo by kind permission of © www.irocks.com |
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Chalcedony Mineral
Size: 6.9 x 4.6 cm Origin: Romania Photo by kind permission of © www.mineraltivadar.hu |
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Chalcedony Mineral
Size: 8.6 x 7.1 cm Origin: Hungary Photo by kind permission of © www.mineraltivadar.hu |
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Chalcedony
Size: 1.23 x 1.23 x 0.64 cm Weight: 7.01 ct Origin: Africa Photo by kind permission of © www.multicolour.com |
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Chalcedony Ring
Chalcedony: 15.22 ct, 2.70 x 1.30 cm, India Gold: 18K Yellow gold Photo by kind permission of © www.africagems.com |
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Chalcedony var. Mtorodite (Chrome-Chalcedony)
Size: 1.21 x 1.21 cm Weight: 5.53 ct Origin: Brazil Photo by kind permission of © www.irocks.com |
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Chalcedony var. Mtorodite (Chrome-Chalcedony)
Weight: 1.06 ct Origin: Mtoroshanga / Mashonaland West / Zimbabwe Photo by kind permission of © www.gemfrance.com |
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Formula Chrysoprase: SiO2
Chrysopraas, Chrysopras, Chryzopraz, Crisoprasa, Crisoprase, Crisoprasio, Krizopras, Krysopras, Prazems, Хризопраз, クリソプレーズ, 绿玉髓, כריזופראס Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): 2.58 - 2.64 Refractive index: 1.530 - 1.540 Colors: green Fluorescence: - Pleochroism: - Largest Chrysoprase: ? Deposits: Poland, Australia, Brazil, India, Madagascar, South Africa, Russia, USA Name: a combination of the Greek words "chrysos" (gold), and "prason" (leek) |
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Chrysoprase Mineral
Size: 9.7 x 5.7 cm Origin: Poland Photo by kind permission of © www.mineraltivadar.hu |
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Chrysoprase Mineral
Size: 2.1 x 1.6 x 1.4 cm Origin: Australia Photo by kind permission of © Darlene Cobler |
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Chrysoprase
Size: 0.89 x 0.69 cm Weight: 1.29 ct Origin: Australia Photo by kind permission of © www.irocks.com |
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Chrysoprase Mineral
Size: 12 x 7 cm Origin: Mt. Hay / Queensland / Australia Photo by kind permission of © www.douglassminerals.com |
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Chrysoprase
Size: 0.41 cm Weight: 0.17 ct Origin: Australia Photo by kind permission of © www.irocks.com |
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Chrysoprase
Size: 1.62 x 0.88 cm Weight: 3.73 ct Origin: Brazil Photo by kind permission of © www.thegemtrader.com |
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Chrysoprase Mineral
Origin: Marlborough Mine / Queensland / Australia Photo by kind permission of © www.cs.cmu.edu/~adg/adg-piimages.html |
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Chrysoprase
Weight: 0.60 ct Origin: Mantena / Minas Gerais / Brazil Photo by kind permission of © http://lucianabarbosa.com |
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Chrysoprase Mineral
Origin: Yerilla Mine / Western Australia / Australia Photo by kind permission of © www.TreasureMountainMining.com |
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Chrysoprase Sculpture
Size: 3.0 x 2.3 x 1.5 cm Origin: Queensland / Australia Photo by kind permission of © www.steveperrygems.com |
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⇐ Intro Page ⇐ Gemstones
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Formula Citrine: SiO2
Citrien, Citrin, Citrinas, Citrino, Cuarzo citrino, Cytryn, Sitriini, Sitrin, Цитрин, 黃水晶, סיטרין, シトリン Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.543 - 1.554 Colors: light yellow - golden brown Fluorescence: - Pleochroism: slight: light yellow -yellow; burned Citrine: - Largest Citrine: 20,200 ct ("Malaga" Citrine) Deposits: Brazil, Madagascar, USA, Spain, Russia, France, Scotland Name: from the Latin word "citrus" (lemon plant / Citrus limon) |
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Citrine
Size: 2.02 x 1.64 x 1.29 cm Weight: 24.82 ct Origin: Brazil Photo by kind permission of © www.ajsgem.com |
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Citrine
Size: 3.75 x 3.75 x 2.40 cm Weight: 148.83 ct Origin: Brazil Photo by kind permission of © www.ajsgem.com |
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Citrine Mineral
Origin: Minas Gerais / Brazil Photo by kind permission of © www.TreasureMountainMining.com |
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Citrine Ring
Citrine: 7.0 ct, 1.2 x 1.2 cm Diamonds: 36, total 0.66 ct Gold: 14K White gold Photo by kind permission of © www.africagems.com |
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Citrine Ring
Citrine: 5.4 ct; 1.20 x 1.00 cm; Brazil Diamonds: 16, total 0.08 ct Gold: 14K Yellow gold Photo by kind permission of © www.africagems.com |
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Citrine Mineral
Size: 16.51 x 8.64 x 5.59 cm Origin: Sierra do Cabral / Santa Clara / Minas Gerais / Brazil Photo by kind permission of © www.treasuremountainmining.com |
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Citrine
Size: 1.38 x 1.19 x 0.8 cm Weight: 10.08 ct Origin: Brazil Photo by kind permission of © www.gemfrance.com |
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Citrine Ring
Citrine: 6.70 ct, 1.40 x 1.20 cm, Brazil Diamonds: 40, total 0.45 ct Gold: 18K White gold Photo by kind permission of © www.africagems.com |
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Citrine Mineral
Size: 18.8 x 12.7 x 9.14 cm Origin: Sao Geraldo do Baixo / Minas Gerais / Brazil Photo by kind permission of © www.treasuremountainmining.com |
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Citrine
Size: 1.11 x 0.9 cm Weight: 3.49 ct Origin: Brazil Photo by kind permission of © www.irocks.com |
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Citrine Ring
Citrine: 2.11 ct; 0.9 x 0.7 cm Diamonds: 59, total 0.32 ct Gold: 14K Yellow gold Photo by kind permission of © www.africagems.com |
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Citrine Ring
Citrine: 5.25 ct; 1.20 x 1.00 cm; Brazil Diamonds: 2, total 0.15 ct Gold: 14K Yellow gold Photo by kind permission of © www.africagems.com |
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Citrine Cat's Eye
Size: 2.40 x 2.40 x 1.64 cm Weight: 63.63 ct Origin: Brazil Photo by kind permission of © www.ajsgem.com |
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Dendritic Quartz
Size: 2 x 1.45 cm Weight: 17.01 ct Origin: Brazil Photo by kind permission of © www.irocks.com |
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Dendritic Quartz
Size: 2.01 x 1.52 cm Weight: 13.63 ct Origin: Brazil Photo by kind permission of © www.irocks.com |
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Dendritic Quartz
Size: 2.5 x 1.4 x 0.5 cm Weight: 14.80 ct Origin: Galileia / Minas Gerais / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Formula Heliotrope (Bloodstone): SiO2
Heliotroop, Heliotrop, Heliotropo, הליוטרופ, 血玉髓 (又称鸡血石), ブラッドストーン Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7 Density (g/cm3): 2.59 - 2.65 Refractive index: 1.543 - 1.554 Colors: green with red dots Fluorescence: - Pleochroism: - Largest Heliotrope: ? Deposits: Austria (Tirol), Czech Republic (Krkonoše), Russia (Ural), China, India, Australia, Brazil, USA Name: Heliotrope: From the Greek words "helios" (sun), and "tropos" (turn); Bloodstone: Derives from the red inclusions which look like spots of blood. In German "bloodstone" means hematite. |
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Heliotrope Pendant
Heliotrope: 25 g; 4.4 x 3.6 cm Silver: 925/1000 Photo by kind permission of © www.stonemania.co.uk |
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Jasper see the
special page
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Formula Prasiolite: SiO2
Prásio, Prasioliet, Prasiolit, Prasiolith, Празиолит Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.543 - 1.554 Colors: light green, yellow-green Fluorescence: - Pleochroism: slight Largest Prasiolite: ? Deposits: Brazil, USA Name: a combination of the Greek words "prason" (leek), and "lithos" (stone) |
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Prasiolite Ring
Prasiolite: 12.30 ct; 1.80 x 1.30 cm; Brazil Diamonds: 54; total 0.25 ct Gold: 14K yellow gold Photo by kind permission of © www.africagems.com |
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Prasiolite Pendant
Prasiolite: 5.50 ct; 1.10 x 1.10 cm; Brazil Material: 14K gold and sterling silver Photo by kind permission of © www.africagems.com |
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Prasiolite
Size: 1.0 x 0.8 x 0.4 cm Weight: 2.05 ct Origin: Minas Gerais / Brazil Photo by kind permission of © http://lucianabarbosa.com |
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Prasiolite
Weight: 4.95 ct Origin: Minas Gerais / Brazil Photo by kind permission of © http://lucianabarbosa.com |
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⇐ Intro Page ⇐ Gemstones
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Quartz Mineral (blue)
Origin: Valle del Cauca Dep. / Colombia Photo by kind permission of © www.minerals-online.de |
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Quartz Mineral (Hematite inclusions)
Size: 5.23 x 3.95 x 2.72 cm Origin: Jinkouhe / Ebian / Leshan / Sichuan / China Photo by kind permission of © www.mineralman.com |
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Quartz Mineral (Hematite inclusions)
Size: 12.4 x 7.1 x 4.8 cm Origin: Oranje River / Namibia Photo by kind permission of © www.irocks.com |
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Quartz Mineral (Hematite inclusions)
Size: 5.0 x 4.7 x 2.7 cm Origin: Kazakhstan Photo by kind permission of © www.pegmatite.ru |
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Quartz (Hematite inclusions) "Sunset Quartz"
Size: 0.65 x 0.56 cm Weight: 1.00 ct Origin: Brazil Photo by kind permission of © www.thegemtrader.com |
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Quartz Mineral (Hematite inclusions)
Size: 21.9 x 18.4 x 10.4 cm Origin: Jinkouhe / Ebian / Leshan / Sichuan / China Photo by kind permission of © www.irocks.com |
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Quartz Mineral (Hematite inclusions)
Size: 16 x 10 x 6 cm Origin: Sils / Thusis / Domleschg / Grisons (Graubünden) / Switzerland Photo by kind permission of © www.irocks.com |
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Quartz Mineral (Fuchsite inclusions)
Size: 7 x 4 x 2.5 cm Origin: Chaprot Valley / Chalt / Gilgit-Baltistan / Pakistan Photo by kind permission of © www.irocks.com |
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Quartz Mineral
Size: 2.5 x 2 x 1.3 cm Origin: San Benito County / California / USA Photo by kind permission of © www.bandlminerals.com |
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Quartz Mineral (Carbonaceous Inclusions)
Size: 7 x 5 x 3 cm Origin: Monteriggioni / Siena Prov. / Tuscany / Italy Photo by kind permission of © www.webmineralshop.com |
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Quartz (Covellite Inclusions)
Size: 1.4 x 1.01 cm Weight: 6.52 ct Origin: Brazil Photo by kind permission of © www.thegemtrader.com |
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Quartz Star
Size: 1.1 x 1.1 x 0.6 cm Weight: 5.45 ct Origin: Minas Gerais / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Quartz Multi-Star
Size: 1.37 x 1.28 cm Weight: 12.48 ct Origin: Sri Lanka Photo by kind permission of © www.thegemtrader.com |
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Quartz Mineral Trapiche
Size: 1.89 x 1.58 x 0.54 cm Origin: Mogok Area / Myanmar Photo by kind permission of © www.crystal-treasure.com |
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Formula Rock Crystal: SiO2
Bergkristal, Bergkristall, Cristal de roca, Cristal de rocha, Kalnu kristāl, Kryształ górski, Горный хрусталь, 白水晶 Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.543 - 1.554 Colors: colorless Fluorescence: - Pleochroism: - Largest Rock Crystal: ? Deposits: worldwide |
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Rock Crystal Mineral
Origin: Hot Springs / Arkansas / USA Photo by kind permission of © www.TreasureMountainMining.com |
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Rock Crystal
Weight: 405.00 ct Origin: Ron Coleman's Quartz Mine / Hot Springs / Arkansas / USA Photo by kind permission of © www.treasuremountainmining.com |
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Rock Crystal
Size: 1.74 x 1.74 x 1.44 cm Weight: 23.41 ct Origin: Brazil Photo by kind permission of © www.djraregems.com |
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Formula Rose Quartz: SiO2
Kwarc różowy, Quartzo rosa, Rosenquarz, Rosenkvarts, Rozenkwarts, Rózsakvarc, Rožu kvarcs, Ruženín, Růženín, ローズクォーツ, 玫瑰晶, רוז קוורץ Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.543 - 1.554 Colors: rose Fluorescence: slightly dark violet Pleochroism: slight: rose - light rose Largest Rose Quartz: ? Deposits: Brazil, Madagascar |
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Rose Quartz
Size: 1.11 x 0.94 cm Weight: 2.92 ct Origin: Brazil Photo by kind permission of www.irocks.com |
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Rose Quartz Mineral
Origin: Alto da Pitora / Galiléia / Minas Gerais / Brazil Photo by kind permission of © www.exceptionalminerals.com |
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Rose Quartz
Weight: 26.25 ct Origin: Galiléia / Minas Gerais / Brazil Foto mit freundlicher Erlaubnis von © http://lucianabarbosa.com |
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Rose Quartz
Weight: 61.11 ct Origin: Adams Peak / Sri Lanka Photo by kind permission of www.wildfishgems.com |
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Rose Quartz Star
Weight: 27.42 ct Origin: Mogok Area / Mandalay / Myanmar Photo by kind permission of www.crystal-treasure.com |
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Rose Quartz Star
Weight: 301.53 ct Origin: Brazil Photo by kind permission of www.online-edelstein.de |
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Rose Quartz Star
Size: 5.12 x 4.12 x 4.11 cm Weight: 641.95 ct Origin: South Africa Photo by kind permission of www.gemselect.com |
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Rose Quartz Star
Size: 2.55 x 1.88 cm Weight: 77.36 ct Origin: Brazil Photo by kind permission of www.djraregems.com |
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Formula Smoky Quartz: SiO2
Dūmu kvarcs, Quartzo fumado, Rauchquarz, Rökkvarts, Rookkwarts, Savukvartsi, Záhněda, Dumanlı kuvars, Раухтопаз, 煙水晶, スモーキークォーツ Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Refractive index: 1.543 - 1.554 Colors: brown, black, grey Fluorescence: - Pleochroism: brown - reddish-brown Largest Smoky Quartz: ? Deposits: worldwide |
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Smoky Quartz
Size: 2.41 x 1.90 cm Weight: 33.07 ct Origin: Ash Mountain area / nr. Cassiar / British Columbia / Canada Photo by kind permission of © www.alpinegems.ca |
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Smoky Quartz Mineral
Size: 9 x 8.5 x 4.5 cm Origin: Talefre / Aosta Valley / Italy Photo by kind permission of © www.irocks.com |
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Smoky Quartz Mineral
Size: 5.0 x 2.4 x 2.0 cm Origin: Mt. Peterson / Halleluja Junction / Lassen County / California / USA Photo by kind permission of © www.earthstreas.com |
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Smoky Quartz Ring
Smoky Quartz: 3.85 ct; 1.20 x 0.80 cm; Brazil Diamonds: 4; total 0.02 ct Gold: 14K Yellow gold Photo by kind permission of © www.africagems.com |
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Smoky Quartz Mineral
Origin: Mount Ida / Hot Springs / Arkansas / USA Photo by kind permission of © www.TreasureMountainMining.com |
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Smoky Quartz Ring
Smoky Quartz: 8.50 ct; 1.30 x 1.30 cm; Brazil Diamonds: 12; total 0.05 ct Gold: 14K Yellow gold Photo by kind permission of © www.africagems.com |
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Smoky Quartz Ring
Smoky Quartz: 7.40 ct; 1.20 x 1.20 cm; Brazil Diamonds: 2; total 0.08 ct Gold: 14K White gold and Yellow gold Photo by kind permission of © www.africagems.com |
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Smoky Quartz Star
Size: 1.4 x 1.4 cm Weight: 14.67 ct Origin: Orange River / Northern Cape Prov. / South Africa Photo by kind permission of © www.irocks.com |
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Smoky Quartz Trapiche
Size: 2.21 x 2.05 x 0.97 cm Weight: 34.48 ct Origin: Mogok Area / Mandalay Division / Myanmar Photo by kind permission of © www.crystal-treasure.com |
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Formula Tiger's Eye: SiO2
Kwarcowe tygrysie oko, Ochi de tigru, Œil de Tigre, Ojo de tigre, Olho de tigre, Tigerauge, Tigeröga, Tigrie oko, Tigrisszem, Tigrovo oko, Tiikerinsilmä, Tijgeroog, タイガーズアイ, หินตาเสือ, 虎眼石, עין הנמר Mineral class: Oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.6 - 2.7 Refractive index: 1.534 - 1.540 Colors: golden yellow - brownish Fluorescence: - Pleochroism: - Largest Tiger's Eye: ? Deposits: Australia, China, Namibia, South Africa, USA Name: |
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Tiger's Eye Mineral
Origin: Northern Cape Prov. / South Africa Photo by kind permission of © António Manuel Ináçio Martins |
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Tiger's Eye
Size: 1.62 x 1.17 cm Weight: 11.31 ct Origin: Northern Cape Prov. / South Africa Photo by kind permission of www.irocks.com |
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Tiger's Eye Mineral var. "Marra Mamba"
Origin: Mt. Brockman / Hamersley Ranges / Pilbara Region / Western Australia / Australia Photo by kind permission of © http://topgems.homestead.com |
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Tiger's Eye var. "Marra Mamba"
Weight: 70.6 ct Size: 2.3 x 5.5 x 0.6 cm Origin: Mt. Brockman / Hamersley Ranges / Pilbara Region / Western Australia / Australia Photo by kind permission of © http://topgems.homestead.com |
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Tiger's Eye var. "Marra Mamba"
Weight: 44.2 ct Size: 2.5 x 4.3 x 0.6 cm Origin: Mt. Brockman / Hamersley Ranges / Pilbara Region / Western Australia / Australia Photo by kind permission of © http://topgems.homestead.com |
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Tiger's Eye var. "Pietersite"
Weight: 17.32 ct Size: 3.41 x 1.65 x 0.43 cm Origin: South Africa Photo by kind permission of www.djraregems.com |
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Tiger's Eye var. "Pietersite"
Size: 2.5 x 1.8 cm Origin: Namibia Photo by kind permission of www.edelsteine.at |
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Tiger's Eye var. "Pietersite"
Size: 4.0 x 3.0 cm Origin: Namibia Photo by kind permission of www.edelsteine.at |
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