Feldspar

Fältspat, Feldespato, Feldspat, Feldspath, Feldspato, Feltspat, Földpátok, Lauko špatas, Laukšpats, Maasälpä, Päevakivi, Skaleń, Skupina živca, Veldspaat, Živec, مجموعة الفلدسبار, فلدسپات, 長石, 장석, 长石, פצלת השדה, Полевые шпаты, Фелдспат


Name: From the German names "Feld" (German: Field) and "Spat" (German: Rock without ore)

Commonly known      rarer (so called collectors stones)      very rare (rarities)      extremely rare (world rarities)
relatively rare organic material


⇐ Intro Page ⇐ Gemstones

Formula Albite: Na[AlSi3O8]
Albiet, Albiit, Albiitti, Albit, Albita, Albitas, Albīts, Albitt, Альбит, 曹長石, אלביט, 钠长石

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.6 - 2.65
Refractive index: 1.528 - 1.537
Cleavage: different
Colors: white, grey, blueish, greenish, reddish
Luster: vitreous, pearly on cleavages
Transparency: transparent, translucent
Fluorescence: -
Pleochroism: -
Largest Albite crystal: 3 cm?
Deposits: worldwide
Discovery: 1815
1st description: 1892
Name: from the Latin word "albus" (white)
Albite Mineral

Size: 2.4 x 1.7 x 1.1 cm

Origin: Chisone Valley / Torino Prov. / Piedmont / Italy

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

Size of the crystal: 1.5 x 1.0 x 0.4 cm

Origin: San Piero in Campo / Elba / Prov. Livorno / Tuscany / Italy

Photo by kind permission of © Sarah Sudcowsky
Albite Mineral
Albite Mineral

Size of the crystal: 3 mm

Origin: Simpson Quarry / South Glastonbury / Hartford County / Connecticut / USA

Photo by kind permission of © Peter Cristofono
Albite Mineral
Albite Cat's Eye

Weight: 2.99 ct

Origin: Sakangyi Pegmatite / W of Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com

Formula Amazonite: K[AlSi3O8]
Amasoniit, Amazoniet, Amazonit, Amazonita, Amazonitas, Amazonsten, Амазонит, 天河石手串, 天河石

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.56 - 2.58
Refractive index: 1.522 - 1.530
Colors: colorless, white, greenish, blue
Fluorescence: slightly greenish
Pleochroism: -
Largest faceted Amazonite: 53 ct
Deposits: Brazil, India, Japan, Madagascar, Namibia, Russia, USA, Vietnam
Name: from the Amazon river in Brazil
Amazonite

Size: 0.45 x 0.39 cm
Weight: 0.22 ct
Origin: Vietnam

Photo by kind permission of © Darlene Cobler
Amazonite Mineral

Size: 3.2 x 2.6 x 2.5 cm

Origin: Tanokamiyama / Omi Prov. / Japan

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

Origin: Colorado / USA

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

Weight: 27.35 ct

Origin: Santo / Minas Gerais / Brasilien

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

Weight: 0.36 ct

Origin: Afghanistan

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

Size: 4.9 x 4.0 x 3.7 cm

Origin: Amar Hills / Konso / Sidamo Prov. / Ethiopia

Photo by kind permission of © www.kristallplanet.de
Amazonite Mineral
Amazonite Mineral

Size: 4.0 x 3.4 x 2.2 cm

Origin: Lake George Area / Park County / Colorado / USA

Photo by kind permission of © www.minclassics.com
Amazonite Mineral
Amazonite

Weight: 0.55 ct

Origin: Afghanistan

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

Size: 8.3 x 6.9 x 3.3 cm

Origin: Wenshan / Yunnan / China

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

Weight: 72.50 ct

Origin: South Africa

Photo by kind permission of © www.ridderborg.se
Amazonite Mineral

Size: 1.49 x 1.24 x 1.10 cm

Origin: Sakangyi Area / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Amazonite Mineral
Amazonite Cat's Eye

Size: 1.3 x 0.7 x 0.3 cm
Weight: 2 ct
Origin: Crystal Peak Area / Teller County / Colorado / USA

Photo by kind permission of © www.lucianabarbosa.com

Formula Andesine: (Na,Ca)(Si,Al)4O8
Andesien, Andesin, Andesina, Andezin, Andezinas, Andezīns, Andezyn, Андезин, אנדסין, 안데신, 中長石, 中性長石

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.61 - 2.76
Refractive index: 1.543 - 1.551
Cleavage: perfect - good
Colors: colorless, white, grey, yellow-green, orange, red, blue ?
Transparency: transparent - translucent
Luster: vitreous - pearly
Fluorescence: -
Pleochroism: -
Largest faceted andesine: 33.42 ct ?
Deposits: worldwide
1st Description: 1892
Name: from the Andes Mountains in South America
Andesine

Size: 1.2 x 1.2 x 0.9 cm
Weight: 7.35 ct
Origin: Congo ?

Photo by kind permission of © www.kox-gems.com
Andesine

Weight: 2.32 ct

Origin: Congo ?

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

Size: 0.51 cm
Weight: 0.30 ct
Origin: Inner Mongolia / China

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

Weight: 2.67 ct

Origin: Tibet / China

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

Weight: 1.42 ct

Origin: Tibet / China

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

Weight: 6.62 ct

Origin: Congo ?

Photo by kind permission of © www.gemfrance.com
Andesine Ring

Andesine: 0.8 x 0.8 cm; Congo ?; trilliant cut
Other stones: yellow diamond, sapphires, rubies
Gold: 18K yellow and red gold

Photo by kind permission of © www.jeffreyappling.com
Andesine Ring
Andesine

Weight: 2.35 ct

Origin: Tibet / China

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

Weight: 2.89 ct

Origin: Congo ?

Photo by kind permission of © www.gemfrance.com
Andesine Color change: Daylight: green

Size: 1.10 x 0.91 x 0.60 cm
Weight: 3.57 ct
Origin: Africa ?

Photo by kind permission of © www.awesomegems.com
Andesine

Weight: 0.70 ct

Origin: Tibet / China

Photo by kind permission of © www.irocks.com

Formula Bytownite: (Ca,Na)(Si,Al)4O8
Bitovnitas, Bütauniit, Bytowniet, Bytownit, Bytownita, Bytownity, Битовнит, בייטאוניט, 培長石, 바이토우나이트

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.7 - 2.72
Refractive index: 1.563 - 1.583
Cleavage: different
Colors: colorless, white, grey, yellowish, brown
Transparency: transparent
Luster: vitreous
Fluorescence: -
Pleochroism: -
Largest Bytownite: 3 cm?
Deposits: worldwide
Discovery: 1835
1st Description: 1892
Name: from the former name "Bytown" for Ottawa / Canada
Bytownite

Weight: 1.68 ct

Origin: Nevada / USA

Photo by kind permission of © www.rocklogic.biz
Bytownite Mineral

Origin: Ottawa / Carleton County / Ontario / Canada

Photo by kind permission of © António Manuel Ináçio Martins
Bytownite Mineral
Bytownite

Weight: 14.73 ct

Origin: Mexico

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

Size: 1.69 x 1.03 cm
Weight: 7.73 ct
Origin: Ethiopia

Photo by kind permission of © www.edelsteine.at

⇐ Intro Page ⇐ Gemstones




Hauyne is one of the rarest and most expensive gemstones, named after the French mineralogist René Just Haüy (1743 - 1822).

Formula Hauyne: (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
Hauyn, Haüyn, Hauyniitti, Haüyn, Haüyne, Гаюїн, 藍方石

Mineral class: silicates
Crystal system: isometric
Mohs scale: 5 - 6
Density (g/cm3): 2.4 - 2.5
Refractive index: 1.494 - 1.510
Cleavage: distinct
Colors: colorless, blue, green, yellowish? reddish?   Color Sequence
Luster: vitreous - resinous
Fluorescence: LW: sometimes yellow-orange; SW: sometimes rose to orange
Pleochroism: -
Largest rough Hauyne: 89 ct, 3 cm?
Largest faceted Hauyne: 7.5 ct
Deposits:
Eifel Mountains / Germany, Afghanistan, Armenia, Australia, Austria, Canada, China, Ecuador, France, Greenland, Guinea, Italy, Russia, Spain, Sweden, Tahiti, USA
1st Description: 1807
Name: in honor of the French mineralogist René-Just Haüy (1743-1822)
History:
Hauyne was discovered in 1807 by the French mineralogist R.J. Haüy (1743-1822) at the Monte Somma (Vesuv / Italy).
First Description: Brunn-Neergard, 1807.
"Early 1973 the semi precious stones cutter Philip Hobein from Kirschweiler near Idar Oberstein (Germany) found some blue crystals behind the restaurant "Laacher Mühle" *. These crystals called his interest. In his workshop he faceted these xenomorphic crystals. The result was the birth of a new precious stone of sapphire-blue color and very good transparency - the mineral Hauyne."
(Source: www.geoberg.de)
* "Laacher Mühle" is located near Mendig / Eifel Mountains / Germany.
Hauyne Mineral

Origin: Eifel Mts. / Germany

Photo by kind permission of © Kristina Waz
Hauyne

Origin: Eifel Mts. / Germany

Photo by kind permission of © Kristina Waz
Hauyne Mineral

Origin: Eifel Mts. / Germany

Photo by kind permission of © www.hauynwelt.de
Hauyne
Hauyne

Size: 0.4 x 0.3 x 0.2 cm
Weight: 0.13 ct
Origin: Niedermendig / Eifel Mts. / Germany

Photo by kind permission of © www.crystal-treasure.com
Hauyne Mineral

Origin: Eifel Mts. / Germany

Photo by kind permission of © Kristina Waz
Hauyne

Size: 0.42 x 0.33 cm
Weight: 0.25 ct
Origin: Mendig / Eifel Mts. / Germany

Photo by kind permission of © www.kox-gems.com
Hauyne

Origin: Eifel Mts. / Germany

Photo by kind permission of © Kristina Waz
Hauyne

Size: 0.34 x 0.32 cm
Weight: 0.09 ct
Origin: Afghanistan

Photo by kind permission of © Darlene Cobler
Hauyne

Size: 0.47 x 0.47 cm
Weight: 0.19 ct
Origin: Afghanistan

Photo by kind permission of © Darlene Cobler
Hauyne bicolor

Size: 0.5 x 0.3 cm
Weight: 0.25 ct
Origin: Eifel Mts. / Germany

Photo by kind permission of © www.kox-gems.com

⇐ Intro Page ⇐ Gemstones

Formula Labradorite: Na[AlSi3O8]Ca[Al2Si2O8]
Labradoriet, Labradoriitti, Labradorita, Labradoritas, Labradorite, Labradorīts, Лабрадорит, 래브라도라이트, ラブラドライト,
拉長石

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.69 - 2.7
Refractive index: 1.560 - 1.570
Cleavage: different
Colors: varied
Luster: vitreous
Fluorescence: yellowish
Pleochroism: -
Largest Labradorite: 5 cm?
Deposits: Canada, Madagascar, Mexico, Russia, USA
1st Description: 1892
Name: Labradorite: Derived from the deposits along the coast of Labrador / Canada; Spectrolite: Named after the spectrum colors of reflected light
Labradorite var. Spectrolite / Mineral

Origin: Finland

Photo by kind permission of © www.mineraltivadar.hu
Labradorite
Labradorite var. Spectrolite

Size: 2.45 x 1.14 x 0.67 cm
Weight: 12.42 ct
Origin: Madagascar

Photo by kind permission of © www.gemselect.com
Labradorite var. Spectrolite / Brooch

Size: 4.9 x 4.7 cm
Material: Silver
Origin: Finland

Photo by kind permission of © www.atelierpst.com
Spectrolite
Labradorite

Weight: 6.31 ct

Origin: Australia

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

Photo by kind permission of © www.theimage.com
Labradorite
Labradorite

Weight: 5.06 ct

Origin: Australia

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

Origin: Ihosy / Madagascar

Photo by kind permission of © www.TreasureMountainMining.com
Labradorite
Labradorite Var. Spectrolite / Watch

Origin of the spectrolites: Ylämaa / Finland

Photo by kind permission of © www.jalokivitukku.com
Spectrolite Watch
Labradorite

Weight: 78.54 ct

Origin: Australia

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

Size: 3.9 x 3.0 x 1.9 cm

Origin: Antsohamamy Quarry / Tulear / Madagascar

Photo by kind permission of © www.lucianabarbosa.com
Labradorite

Size: 1.42 x 1.33 cm
Weight: 9.26 ct
Origin: Canada

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

Size: 0.92 x 0.72 cm
Weight: 1.60 ct
Origin: Canada

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

Weight: 1.87 ct

Origin: Madagascar

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

Weight: 1.94 ct

Origin: Orissa / India

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

Weight: 0.30 ct

Origin: Madagascar

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

Weight: 6.66 ct

Origin: Madagascar

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

Weight: 12.57 ct

Origin: Mexico

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

Weight: 27 ct
Size: 2.7 x 2.0 x 0.8 cm
Origin: Australia ?

Photo by kind permission of © www.jalokivitukku.com
Labradorite

Weight: 6.14 ct

Origin: Mexico

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

Photo by kind permission of © skywalker.cochise.edu
Labradorite

Size: 4.1 x 1.7 x 0.5 cm
Weight: 54.60 ct
Origin: Australia

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

Weight: 9.81 ct

Origin: Sakangyi Area / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Labradorite Spectrolite Cat's Eye

Size: 0.9 x 0.72 cm
Weight: 1.65 ct
Origin: Madagascar

Photo by kind permission of © www.irocks.com

⇐ Intro Page ⇐ Gemstones

Formula Moonstone: K[AlSi3O8]
Kuukivi, Mėnulio akmuo, Mondstein, Piedra de luna, Лунный камень, ムーンストーン, 月長石, سنگ ماه, אוליגוקלז

Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.56 - 2.62
Refractive index: 1.581 - 1.526
Colors: colorless, yellowish, reddish, brownish, bluish, black
Fluorescence: slightly blueish, orange
Pleochroism: -
Largest Moonstone: ?
Deposits: Sri Lanka, Australia, Myanmar, Brazil, India, Madagascar, Tanzania, USA
Name: reminds one of the moonlight-like shimmering of the stone
Moonstone Mineral

Size: 1.52 x 0.58 x 0.55 cm

Origin: Sakangyi Area / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Moonstone Mineral
Moonstone Mineral

Origin: Brazil

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

Weight: 3.89 ct

Origin: Myanmar

Photo by kind permission of © www.gemfrance.com
Moonstone Ring

Moonstone: 1.90 ct
Diamonds: 2; total 0.55 ct
Ring: 10.20 g; 18K White gold

Photo by kind permission of © Chrisgo-CG-Design
Moonstone Ring
Moonstone

Weight: 2.25 ct

Origin: Tanzania

Photo by kind permission of © www.mainegemcutter.com
Neon Moonstone Mineral

Origin: Tanzania

Photo by kind permission of © www.mainegemcutter.com
Neon Moonstone Mineral
Moonstone

Weight: 1.55 ct

Origin: India

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

Weight: 1.85 ct

Origin: Mogok / Myanmar

Photo by kind permission of © www.americanthai.com
Moonstone Mineral

Size: 2.1 x 1.9 x 1.6 cm

Origin: Sakangyi Area / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Moonstone Mineral
Moonstone

Weight: 1.60 ct
Size: 0.79 x 0.67 cm
Origin: Tanzania

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

Weight: 3.37 ct

Origin: Bihar / India

Photo by kind permission of © www.americanthai.com
Moonstone

Weight: 7.13 ct

Origin: India

Photo by kind permission of © www.americanthai.com
Moonstone Ring

Moonstones (pink): 5, total 4.30 ct
Diamonds: total 1.99 ct
Gold: 18K Yellow Gold

Photo by kind permission of © www.collectorfinejewelry.com
Moonstone

Weight: 39.19 ct

Origin: India

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

Weight: 23.45 ct

Origin: India

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

Weight: 16.37 ct

Origin: India

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

Size: 1.82 x 1.32 cm
Weight: 12.26 ct
Origin: India

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

Weight: 52.68 ct

Origin: India

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

Size: 1.22 cm
Weight: 8.19 ct
Origin: India

Photo by kind permission of © www.irocks.com
Moonstone Cat's Eye

Weight: 7.26 ct

Origin: India

Photo by kind permission of © www.thegemtrader.com
Moonstone Cat's Eye

Weight: 12.36 ct

Origin: India

Photo by kind permission of © www.irocks.com
Moonstone Star

Weight: 16.48 ct

Origin: India

Photo by kind permission of © www.edelsteine.at
Moonstone Star

Size: 1.5 x 1.35 x 1.05 cm
Weight: 15.33 ct
Origin: Balangoda / Sri Lanka

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

⇐ Intro Page ⇐ Gemstones

Formula Oligoclase: (Na,Ca)(Si,Al)4O8
Oligoclasa, Oligoclasita, Oligoklaas, Oligoklas, Oligoklaz, Oligoklazas, Oligoklāzs,
の間を灰曹長石, 올리고클래이스, Олигоклаз

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.64 - 2.66
Refractive index: 1.533 - 1.552
Cleavage: different
Colors: colorless, grey, yellowish, bluish, greenish, rose, brown
Luster: vitreous - pearly
Fluorescence: X-rays: orange, green
Pleochroism: strong
Largest Oligoclase: 6 cm?
Deposits: worldwide
1st Description: 1892
Name: from the Greek words "oligos" (little), and "kasein" (to break)
Oligoclase Mineral
Oligoclase

Weight:: 0.85 ct

Origin:: Tanzania

Photo by kind permission of © www.irocks.com
Oligoclase slightly bluish

Size:: 0.53 x 0.33 cm
Weight:: 0.23 ct
Origin: Faraday Mine / Bancroft / Ontario / Canada

Photo by kind permission of © www.alpinegems.ca
Oligoclase

Size:: 1.15 x 0.90 x 0.57 cm
Weight:: 3.32 ct
Origin:: East Africa

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

Size:: 2.2 x 1.9 x 1.2 cm

Weight:: 23 ct

Photo by kind permission of © www.jalokivitukku.com
Oligoclase "Confetti"

Weight:: 43.48 ct

Origin:: Tanzania

Photo by kind permission of © www.americanthai.com

Formula Orthoclase / Adularia: K(AlSi3O8)
Orthoclase, Orthoklaas, Orthose, Ortoclasa, Ortoclase, Ortoclasio, Ortoklas, Ortoklaz, Ortoklāzs, Ortoklazų,
Ортоклаз, 正長石, אורתוקלז

Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.56 - 2.59
Refractive index: 1.518 - 1.525
Cleavage: very good
Colors: colorless, whitish, grey-yellow, rose, green, brown
Luster: vitreous - pearly
Fluorescence: -
Pleochroism: -
Largest Orthoclase: 20 cm?
Deposits: worldwide
1st Description: 1892
Name: Adularia: Derived from "Adula", the Latin name of Mt. St. Gotthard in the Swiss Alps. Orthoclase: From the Greek words "orthos" (right) and "kalo" (I cleave) which mean "straight fracture"
Orthoclase

Weight: 4.61 ct

Origin: Sakangyi Area / Mogok / Myanmar

Photo by kind permission of © www.crystal-treasure.com
Orthoclase

Weight: 44.61 ct

Origin: Madagascar

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

Size: 1.6 x 1.4 x 0.7 cm

Origin: Itrongay / Betroka Dep. / Madagascar

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

Origin: Hrongay / Betroka Dep. / Horombe Region / Fianarantsoa Prov. / Madagascar

Photo by kind permission of © www.mindat.org
Orthoclase Mineral
Orthoclase

Weight: 69.15 ct

Origin: Madagascar

Photo by kind permission of © www.americanthai.com
Orthoclase

Weight: 3,34 ct

Origin: Madagascar

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

Weight: 33.87 ct

Origin: Madagascar

Photo by kind permission of © www.djraregems.com
Orthoclase

Size: 1.37 x 0.96 x 0.51 cm
Weight: 4.03 ct
Origin: Tanzania

Photo by kind permission of © www.djraregems.com
Orthoclase

Size: 2.37 x 2.06 cm
Weight: 43.27 ct
Origin: Madagascar

Photo by kind permission of © www.edelsteine.at
Orthoclase Mineral

Origin: Minh Tien Pegmatite / Luc Yen / Yen Bai Prov. / Vietnam

Photo by kind permission of © www.caltech.edu/, Dr. George Rossman
Orthoclase Mineral
Orthoclase

Size: 1.42 x 0.99 x 0.65 cm
Weight: 3.68 ct
Origin: Vietnam

Photo: Wimon Manorotkul, by kind permission of © www.palagems.com
Orthoclase Cat's Eye

Weight: 4.37 ct

Origin: Tanzania

Photo by kind permission of © www.steveperrygems.com
Orthoclase Star

Size: 1.61 x 1.42 cm
Weight: 17.33 ct
Origin: India

Photo by kind permission of © www.ke4gems.com
Orthoclase "Adularia" Mineral

Origin: Mt. Großvenediger / Hohe Tauern Mts. / Salzburg / Austria

Photo by kind permission of © www.fabreminerals.com
Orthoclase Mineral
Orthoclase "Adularia"

Size: 0.7 x 0.59 cm
Weight: 0.88 ct
Origin: Zillertal Valley / Austria

Photo by kind permission of © www.irocks.com

⇐ Intro Page ⇐ Gemstones

Formula Peristerite: Na,Al,Si3O
Peristerit, ペリステライト

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.61 - 2.63
Refractive index: 1.525 - 1.536
Colors: whitish, brownish, blue iridescence
Fluorescence: -
Pleochroism: -
Largest Peristerite: ?
Deposits: Canada
Name: from the Greek word "peristera" (pigeon)
Peristerite Mineral

Size: 5 cm

Origin: Chupa Bay Pegmatite / Korelia Rep. / Russia

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

Formula Sanidine: (K,Na)(Si,Al)4O8
Riacolita, Sanidiini, Sanidin, Sanidina, Sanidino, Sanidīns, サニディン, Санидин, 새니딘

Mineral class: silicates
Crystal system: monoclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.53 - 2.56
Refractive index: 1.518 - 1.530
Cleavage: perfect - distinct
Colors: colorless, white, champagne
Luster: vitreous
Fluorescence: -
Pleochroism: -
Largest Sanidine: 50 cm?
Deposits: worldwide
1st Description: 1892
Name: from the Greek words "sanis" (little plate), and "idos" (to see)
Sanidine

Weight: 1.51 ct

Origin: Eifel Mts. / Germany

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

Size: Micromount

Origin: Niveligsberg / Kelberg / Eifel Mts. / Rhineland-Palatinate / Germany

Photo by kind permission of © Stephan Wolfsried
Sanidine Mineral
Sanidine

Weight: 2.38 ct

Origin: Eifel Mts. / Germany

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

Weight: 2.01 ct

Origin: Eifel Mts. / Germany

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

Size: 3.00 x 1.93 cm
Weight: 40.13 ct
Origin: Itrongay / Madagascar

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

Weight: 11.01 ct

Origin: Eifel Mts. / Germany

Photo by kind permission of © www.irocks.com

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Formula Sunstone: (K,Na)(Si,Al)4O8
Sonnenstein, 太陽石, サンストーン

Mineral class: silicates
Crystal system: triclinic
Mohs scale: 6 - 6.5
Density (g/cm3): 2.62 - 2.66
Refractive index (Oregon Sunstone): 1.525 - 1.580
Colors: reddish-orange, green, blue
Fluorescence: -
Pleochroism: -
Largest Oregon Sunstone: 54 ct?
Deposits: Canada, India, Russia, Sweden, Sri Lanka, USA
Name: reminds one of the sunlight-like shimmering of the stone
History:
Already Pope Clemens VII. (1478 - 1534) should have possessed a Sunstone.
Indians in todays Oregon / USA exchanged Sunstone.
First description: Breithaupt, 1826
In 1987 the Oregon Sunstone was declared official gem of the state Oregon.
Discovery of the "Massai Sunstone" in Tanzania in 2000, near Arusha.
(Source: www.gemstv.de)
Sunstone

Weight: 0.78 ct

Origin: Plush / Oregon / USA

Photo by kind permission of © www.irocks.com
Sunstone "Confetti"

Weight: 3.43 ct

Origin: Tanzania

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

Size: 1.37 x 1.0 cm
Weight: 4.84 ct
Origin: Plush / Oregon / USA

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

Size: 1.15 x 1.2 cm
Weight: 3.43 ct
Origin: Plush / Oregon / USA

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

Size: 1.69 x 1.08 cm
Weight: 7.97 ct
Origin: Plush / Oregon / USA

Photo by kind permission of © www.rarestone.com
Sunstone

Weight: 2,38 ct

Origin: Plush / Oregon / USA

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

Size: 1.4 x 1.15 cm
Weight: 7.45 ct
Origin: Plush / Oregon / USA

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

Weight: 0.5 ct

Origin: Plush / Oregon / USA

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

Weight: 1.28 ct

Origin: Plush / Oregon / USA

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

Origin: Plush / Oregon / USA

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

Weight: 2.80 ct

Origin: Dust Devil Mine / Plush / Oregon / USA

Photo by kind permission of © www.theimage.com
Sunstone Mineral

Origin: India

Photo by kind permission of © www.mineraltivadar.hu
Sunstone Mineral
Sunstone with Hematite Inclusions

Size: 2.9 x 1.53 x 0.89 cm
Weight: 20.37 ct
Origin: Arusha / Tanzania

Photo: Mia Dixon, by kind permission of © www.palagems.com
Sunstone
Sunstone

Weight: 0.36 ct
Size: 0.6 x 0,42 x 0.26 cm
Origin: Plush / Oregon / USA

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

Size: 1.92 x 1.25 cm
Weight: 13.73 ct
Origin: Plush / Oregon / USA

Photo by kind permission of © www.rarestone.com
Sunstone

Size: 1 cm
Weight: 4.50 ct
Origin: Plush / Oregon / USA

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

Weight: 3.70 ct

Origin: India

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

Size: 1.92 x 1.45 cm
Weight: 12.38 ct
Origin: Plush / Oregon / USA

Photo by kind permission of © www.rarestone.com
Sunstone

Size: 1.2 cm
Weight: 6.56 ct
Origin: Plush / Oregon / USA

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

Weight: 3.25 ct

Origin: Dust Devil Mine / Plush / Oregon / USA

Photo by kind permission of © www.theimage.com
Sunstone

Origin: Plush / Oregon / USA

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

Photo by kind permission of © www.theimage.com
Sunstone Mineral
Sunstone

Size: 1.03 cm
Weight: 2.88 ct
Origin: Plush / Oregon / USA

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

Size: 1.1 cm
Weight: 3.76 ct
Origin: Plush / Oregon / USA

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

Weight: 1.45 ct

Origin: Plush / Oregon / USA

Photo by kind permission of © www.minclassics.com
Sunstone

Weight: 1.14 ct

Origin: Plush / Oregon / USA

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

Weight: 0.43 ct

Origin: Plush / Oregon / USA

Photo by kind permission of © www.irocks.com
Sunstone Cat's Eye

Weight: 4.29 ct

Origin: India

Photo by kind permission of © www.irocks.com
Sunstone Cat's Eye

Weight: 3.97 ct

Origin: India

Photo by kind permission of © www.irocks.com
Sunstone Star

Weight: 4.46 ct

Origin: India

Photo by kind permission of www.online-edelstein.de
Sunstone Star

Size: 1.88 x 1.43 x 1.24 cm
Weight: 23.68 ct
Origin: India

Photo by kind permission of www.gemselect.com


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