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

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)
Agate Mineral

Origin: Waldhambach / Rhineland-Palatinate / Germany

Photo by kind permission of © www.mineralroli.de
Agate
Agate Mineral

Origin: Argentina

Photo by kind permission of © www.mineralroli.de
Agate
Agate Mineral

Origin: Rancho Coyamito / Ricardo Flores Magón / Chihuahua / Mexico

Photo by kind permission of © www.achate.at
Agate
Agate Mineral

Origin: Australia

Photo by kind permission of © www.mineralroli.de
Agate
Agate Mineral

Origin: Uruguay

Photo by kind permission of © www.mineralroli.de
Agate
Agate Mineral

Origin: Rancho Aparejos / Ricardo Flores Magón / Chihuahua / Mexico

Photo by kind permission of © www.achate.at
Agate
Agate Mineral

Origin: Janos / Chihuahua / Mexico

Photo by kind permission of © www.achate.at
Agate
Agate Mineral

Origin: Lausitz / Saxony / Germany

Photo by kind permission of © www.mineralroli.de
Agate
Agate Mineral

Size: 6.5 x 4.2 x 1.6 cm

Origin: Gyöngyöstarján / Hungary

Photo by kind permission of © www.mineraltivadar.hu
Agate Mineral
Agate Mineral

Origin: Rhine Area / Germany

Photo by kind permission of © www.achate.at
Agate
Agate Mineral

Size: 6.8 x 4.8 x 2.4 cm

Origin: Gyöngyöstarján / Hungary

Photo by kind permission of © www.mineraltivadar.hu
Agate Mineral
Agate Mineral

Origin: Burn Anne / Scotland / Great Britain

Photo by kind permission of © www.achate.at
Agate
Agate Mineral

Size: 7.0 x 5.2 x 2.1 cm

Origin: Gyöngyöstarján / Hungary

Photo by kind permission of © www.mineraltivadar.hu
Agate Mineral
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
Agate
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
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
Fire Agate
Agate "Fire Agate"

Size: 1.39 x 1.06 cm
Weight: 5.79 ct
Origin: Mexico

Photo by kind permission of © www.thegemtrader.com
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
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
Agate

Size: 2.2 x 1.9 x 1.0 cm

Origin: Botswana

Photo by kind permission of © www.lucianabarbosa.com
Agate Eye
Agate

Size: 5.5 x 4.5 cm

Origin: Montana / USA

Photo by kind permission of © www.edelsteine.at
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
Agate UV Light
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
Agate Sculpture
Landscape Agates

Size: 2.0 x 1.5 cm
Weight: 16.15 ct
Origin: Brazil

Photo by kind permission of © www.gemfrance.com
Landscape Agates
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
Landscape Agate
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
Landscape Agate
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
Agate Sculpture (Dragon)

Size: 25.1 x 20.9 x 5.2 cm

Origin: China

Photo by kind permission of © www.irocks.com
Agate sculpture
Agate Cameo

Cameo blue Agate

Gold: 14K yellow gold

Photo by kind permission of © www.portraitcameos.com
Agate
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
Agate Ring

⇐ Intro Page ⇐ Gemstones

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)
Amethyst Mineral

Origin: Hubei Prov. / China

Photo by kind permission of © www.treasuremountainmining.com
Amethyst China
Amethyst

Weight: 22.71 ct

Origin: Zambia

Photo by kind permission of © www.multicolour.com
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
Amethyst Ring
Amethyst

Weight: 4.67 ct

Origin: Zambia

Photo by kind permission of © www.multicolour.com
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
Amethyst Ring
Amethyst Mineral

Size: 10.8 x 8.1 x 5.0 cm

Origin: Uruguay

Photo by kind permission of © www.aarockshop.com
Amethyst Mineral
Amethyst

Weight: 14.84 ct

Origin: Uruguay

Photo by kind permission of © www.gemfrance.com
Amethyst

Weight: 30.21 ct

Origin: Hpa-An / Myanmar

Photo by kind permission of © www.americanthai.com
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
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
Amethyst Ring
Amethyst Brooch

Diamonds: 4; total 0.10 ct

Gold: 14K Yellow gold, 20.8 g

Photo by kind permission of © Chrisgo-CG-Design
Amethyst Brooch
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
Amethyst Ring
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
Amethyst
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
Amethyst Pendant
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
Amethyst Ring
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
Amethyst bicolor

Size: 1.79 x 1.29 cm
Weight: 14.46 ct
Origin: Brazil

Photo by kind permission of © www.ridderborg.se

⇐ Intro Page ⇐ Gemstones

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"
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
Ametrine
Ametrine

Weight: 27.23 ct

Origin: Bolivia

Photo by kind permission of © www.multicolour.com
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
Ametrine Sculpture

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)
Aventurine

Photo by kind permission of © http://skywalker.cochise.edu/wellerr/
Aventurine
Aventurine

Weight: 42.03 ct

Origin: Brazil

Photo by kind permission of © www.online-edelstein.de

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
Binghamite Mineral

Origin: Cuyuna Iron Range / Crosby / Crow Wing County / Minnesota / USA

Photo by kind permission of © www.cs.cmu.edu/
Binghamite

Bloodstone ⇓ Heliotrope

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"
Carnelian

Weight: 7.96 ct

Origin: Balangoda / Sri Lanka

Photo by kind permission of © www.wildfishgems.com
Carnelian

Weight: 48.06 ct

Origin: India

Photo by kind permission of © www.online-edelstein.de
Carnelian

Size: 1,49 x 1,14 cm
Weight: 5.30 ct
Origin: Mozambique

Photo by kind permission of © www.irocks.com
Carnelian

Weight: 2.60 ct

Origin: Mozambique

Photo by kind permission of © www.irocks.com
Carnelian bicolor

Size: 1.80 x 1.30 cm
Weight: 13.37 ct
Origin: Mozambique

Photo by kind permission of © www.irocks.com
Carnelian bicolor

Weight: 5.23 ct

Origin: Madagascar

Photo by kind permission of © www.thegemtrader.com

⇐ Intro Page ⇐ Gemstones

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
Chalcedony Mineral

Size: 5.6 x 4.4 cm

Origin: Hungary

Photo by kind permission of © www.mineraltivadar.hu
Chalcedony Mineral
Chalcedony Mineral

Size: 7.3 x 3.9 x 3 cm

Origin: Blinkpan / Karas Reg. / Namibia

Photo by kind permission of © www.irocks.com
Chalcedony Mineral
Chalcedony

Size: 1.05 x 1.05 x 0.7 cm
Weight: 3.45 ct
Origin: Namibia

Photo by kind permission of © JewelsRoughGems
Chalcedony "Paraiba-Chalcedony"

Size: 0.6 cm
Weight: 0.70 ct
Origin: Brazil

Photo by kind permission of © www.irocks.com
Chalcedony
Chalcedony Mineral

Size: 6.9 x 4.6 cm

Origin: Romania

Photo by kind permission of © www.mineraltivadar.hu
Chalcedony Mineral
Chalcedony

Photo by kind permission of © http://skywalker.cochise.edu
Chalcedony
Chalcedony Mineral

Size: 8.6 x 7.1 cm

Origin: Hungary

Photo by kind permission of © www.mineraltivadar.hu
Chalcedony Mineral
Chalcedony

Weight: 12.52 ct

Origin: Africa

Photo by kind permission of © www.multicolour.com
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
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
Chalcedony Ring
Chalcedony

Weight: 2.53 ct

Origin: Brazil

Photo by kind permission of © www.irocks.com
Chalcedony

Origin: Indonesia

Photo by kind permission of © www.color-wright.com
Chalcedony
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
Chalcedony var. Mtorodite (Chrome-Chalcedony)

Weight: 1.06 ct

Origin: Mtoroshanga / Mashonaland West / Zimbabwe

Photo by kind permission of © www.gemfrance.com

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)
Chrysoprase Mineral

Size: 9.7 x 5.7 cm

Origin: Poland

Photo by kind permission of © www.mineraltivadar.hu
Chrysoprase
Chrysoprase Mineral

Size: 2.1 x 1.6 x 1.4 cm

Origin: Australia

Photo by kind permission of © Darlene Cobler
Chrysoprase
Chrysoprase

Size: 0.89 x 0.69 cm
Weight: 1.29 ct
Origin: Australia

Photo by kind permission of © www.irocks.com
Chrysoprase Mineral

Size: 12 x 7 cm

Origin: Mt. Hay / Queensland / Australia

Photo by kind permission of © www.douglassminerals.com
Chrysoprase Mineral
Chrysoprase

Size: 0.41 cm
Weight: 0.17 ct
Origin: Australia

Photo by kind permission of © www.irocks.com
Chrysoprase

Size: 1.62 x 0.88 cm
Weight: 3.73 ct
Origin: Brazil

Photo by kind permission of © www.thegemtrader.com
Chrysoprase

Weight: 26.32 ct

Origin: Tanzania

Photo by kind permission of © www.multicolour.com
Chrysoprase Mineral

Origin: Marlborough Mine / Queensland / Australia

Photo by kind permission of © www.cs.cmu.edu/~adg/adg-piimages.html
Chrysoprase
Chrysoprase

Weight: 0.60 ct

Origin: Mantena / Minas Gerais / Brazil

Photo by kind permission of © http://lucianabarbosa.com
Chrysoprase Mineral

Origin: Yerilla Mine / Western Australia / Australia

Photo by kind permission of © www.TreasureMountainMining.com
Calcite
Chrysoprase

Size: 2.16 x 0.81 cm

Origin: Australia

Photo by kind permission of © www.edelsteine.at
Chrysoprase

Size: 1.46 x 0.71 cm

Origin: Australia

Photo by kind permission of © www.edelsteine.at
Chrysoprase Sculpture

Size: 3.0 x 2.3 x 1.5 cm

Origin: Queensland / Australia

Photo by kind permission of © www.steveperrygems.com
Chrysoprase

⇐ Intro Page ⇐ Gemstones

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)
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
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
Citrine

Weight: 37.52 ct

Origin: Brazil

Photo by kind permission of © www.online-edelstein.de
Citrine Mineral

Origin: Olkhovka / Urals / Russia

Photo by kind permission of © www.irocks.com
Citrine Mineral
Citrine

Weight: 22.37 ct

Origin: Tanzania

Photo by kind permission of © www.djraregems.com
Citrine Mineral

Origin: Minas Gerais / Brazil

Photo by kind permission of © www.TreasureMountainMining.com
Citrine
Citrine

Weight: 7.20 ct

Origin: Bolivia

Photo by kind permission of © www.multicolour.com
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
Citrine Ring
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
Citrine Ring
Citrine Mineral

Origin: Polar Urals / Russia

Photo by kind permission of © www.irocks.com
Citrine
Citrine

Weight: 5.81 ct

Origin: Brazil

Photo by kind permission of © www.online-edelstein.de
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
Citrine
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
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
Citrine Ring
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
Citrine
Citrine

Weight: 9.48 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com
Citrine Mineral

Weight: 39.91 ct

Origin: Uruguay

Photo by kind permission of © www.wsfgems.com
Citrine
Citrine

Size: 1.63 x 1.63 cm

Weight: 14.10 ct

Photo by kind permission of © www.wsfgems.com
Citrine

Size: 1.11 x 0.9 cm
Weight: 3.49 ct
Origin: Brazil

Photo by kind permission of © www.irocks.com
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
Citrine Ring
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
Citrine Ring
Citrine Mineral bicolor

Photo by kind permission of © www.skywalker.cochise.edu
Citrine Mineral
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

Dendritic Quartz

Size: 2 x 1.45 cm
Weight: 17.01 ct
Origin: Brazil

Photo by kind permission of © www.irocks.com
Dendritic Quartz
Dendritic Quartz

Size: 2.01 x 1.52 cm
Weight: 13.63 ct
Origin: Brazil

Photo by kind permission of © www.irocks.com
Dendritic Quartz
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
Dendritic Quartz

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.
Heliotrope Mineral

Origin: India

Photo by kind permission of © www.mineraltivadar.hu
Heliotrope Mineral
Heliotrope

Size: 1.35 x 1.09 cm

Origin: Germany

Photo by kind permission of © www.edelsteine.at
Heliotrope Pendant

Heliotrope: 25 g; 4.4 x 3.6 cm

Silver: 925/1000

Photo by kind permission of © www.stonemania.co.uk
Heliotrope Pendant

Jasper see the special page

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)
Prasiolite

Weight: 2.08 ct

Origin: Brazil

Photo by kind permission of © www.online-edelstein.de
Prasiolite

Weight: 11.67 ct

Origin: Brazil

Photo by kind permission of © www.edelsteine.at
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
Prasiolite Ring
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
Prasiolite Ring
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
Prasiolite

Weight: 23.46 ct

Origin: Brazil

Photo by kind permission of © www.multicolour.com
Prasiolite

Weight: 4.95 ct

Origin: Minas Gerais / Brazil

Photo by kind permission of © http://lucianabarbosa.com

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Quartz Mineral (blue)

Origin: Valle del Cauca Dep. / Colombia

Photo by kind permission of © www.minerals-online.de
Quartz Mineral
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
Quartz Mineral
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
Quartz Mineral
Quartz Mineral (Hematite inclusions)

Size: 5.0 x 4.7 x 2.7 cm

Origin: Kazakhstan

Photo by kind permission of © www.pegmatite.ru
Quartz Mineral
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
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
Quartz Mineral
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
Quartz Mineral
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
Quartz Mineral
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
Green Quartz
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
Quartz Mineral
Quartz (Covellite Inclusions)

Size: 1.4 x 1.01 cm
Weight: 6.52 ct
Origin: Brazil

Photo by kind permission of © www.thegemtrader.com
Quartz bicolor

Weight: 13.26 ct

Origin: Namibia

Photo by kind permission of © www.irocks.com
Quartz bicolor

Weight: 16.55 ct

Origin: Brazil

Photo by kind permission of © www.thegemtrader.com
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
Quartz Star

Weight: 156.74 ct

Origin: Brazil

Photo by kind permission of © www.online-edelstein.de
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
Quartz Star
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
Quartz Trapiche

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
Rock Crystal Mineral

Origin: Hot Springs / Arkansas / USA

Photo by kind permission of © www.TreasureMountainMining.com
Rock Crystal
Rock Crystal

Weight: 405.00 ct

Origin: Ron Coleman's Quartz Mine / Hot Springs / Arkansas / USA

Photo by kind permission of © www.treasuremountainmining.com
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
Rock Crystal Ring

Material: Silver

Photo by kind permission of © www.wolfpiontek.de
Quartz Ring

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
Rose Quartz

Size: 1.11 x 0.94 cm
Weight: 2.92 ct
Origin: Brazil

Photo by kind permission of www.irocks.com
Rose Quartz

Origin: Brazil

Photo by kind permission of www.irocks.com
Rose Quartz Mineral

Origin: Alto da Pitora / Galiléia / Minas Gerais / Brazil

Photo by kind permission of © www.exceptionalminerals.com
Rose Quartz
Rose Quartz

Weight: 20.53 ct

Origin: Madagascar

Photo by kind permission of www.gemfrance.com
Rose Quartz

Weight: 26.25 ct

Origin: Galiléia / Minas Gerais / Brazil

Foto mit freundlicher Erlaubnis von © http://lucianabarbosa.com
Rose Quartz

Weight: 61.11 ct

Origin: Adams Peak / Sri Lanka

Photo by kind permission of www.wildfishgems.com
Rose Quartz Star

Weight: 27.42 ct

Origin: Mogok Area / Mandalay / Myanmar

Photo by kind permission of www.crystal-treasure.com
Rose Quartz Star

Weight: 301.53 ct

Origin: Brazil

Photo by kind permission of www.online-edelstein.de
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
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
Smoky Quartz

Weight: 4.67 ct

Origin: Brazil

Photo by kind permission of © www.irocks.com
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
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
Smoky Quartz
Smoky Quartz

Size: 2.52 x 1.75 cm

Weight: 28.47 ct

Photo by kind permission of © www.rarestone.com
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
Smoky Quartz
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
Smoky Quartz Ring
Smoky Quartz Mineral

Origin: Mount Ida / Hot Springs / Arkansas / USA

Photo by kind permission of © www.TreasureMountainMining.com
Smoky Quartz
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
Smoky Quartz Ring
Smoky Quartz

Weight: 73.28 ct

Photo by kind permission of © www.edelsteine.at
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
Smoky Quartz Ring
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
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
Quartz Trapiche

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:
Tiger's Eye Mineral

Origin: Northern Cape Prov. / South Africa

Photo by kind permission of © António Manuel Ináçio Martins
Tigers Eye Mineral
Tiger's Eye

Photo by kind permission of © http://skywalker.cochise.edu
Tiger's Eye

Origin: South Africa

Photo by kind permission of www.edelsteine.at
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
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
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
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
Tiger's Eye Marra Mamba
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
Tiger's Eye var. "Pietersite"

Size: 2.5 x 1.8 cm

Origin: Namibia

Photo by kind permission of www.edelsteine.at
Tiger's Eye var. "Pietersite"

Size: 4.0 x 3.0 cm

Origin: Namibia

Photo by kind permission of www.edelsteine.at
Tiger's Eye var. "Pietersite"

Photo by kind permission of © http://topgems.homestead.com


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