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
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
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 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 |
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Agate Mineral
Origin: Waldhambach / Rhineland-Palatinate / Germany Photo by kind permission of © www.mineralroli.de, Roland Noack. |
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Agate Mineral
Origin: Rancho Coyamito / Chihuahua / Mexico Photo by kind permission of © www.achate.at, Johann Zenz. |
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Agate Mineral
Origin: Rancho Aparejos / Chihuahua / Mexico Photo by kind permission of © www.achate.at, Johann Zenz. |
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Agate Mineral
Origin: Janos / Chihuahua / Mexico Photo by kind permission of © www.achate.at, Johann Zenz. |
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Agate Mineral
Origin: Lausitz / Saxony / Germany Photo by kind permission of © www.mineralroli.de, Roland Noack. |
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Agate Mineral
Origin: Rhine area / Germany Photo by kind permission of © www.achate.at, Johann Zenz. |
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Agate Mineral
Origin: Burn Anne / Scotland / Great Britain Photo by kind permission of © www.achate.at, Johann Zenz. |
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Agate Mineral (Fire Agate)
Weight: 12.77 ct Origin: Mexico Photo by kind permission of © www.thegemtrader.com, Brad Payne. |
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Agate
Size: 5.5 x 4.5 cm Origin: Montana / USA Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Landscape Agates
Weight: 16.15 ct Size: 2.0 x 1.5 cm Origin: Brazil Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji. |
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Landscape Agate Pendant
Weight: 9.11 g Size: 2.6 x 1.94 cm, 750/000 Gold Origin of the agate: Brazil Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji. |
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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, Dr. Robert Lavinsky. |
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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 Colors: violet Fluorescence: slightly greenish Pleochroism: slightly violet - grey-violet Largest Amethyst: ? Deposits: weltweit |
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Amethyst Mineral
Origin: Hubei Province / China Photo by kind permission of © www.TreasureMountainMining.com, Eric Greene. |
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Amethyst
Weight: 22.71 ct Origin: Zambia Photo by kind permission of © www.multicolour.com, David Weinberg. |
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Amethyst Mineral
Size: 5.2 x 0.5 x 0.5 cm Origin: Brandberg / Namibia Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Amethyst 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, Wolf Piontek. |
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Amethyst
Weight: 4.67 ct Origin: Zambia Photo by kind permission of © www.multicolour.com, David Weinberg. |
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Amethyst
Weight: 30.21 ct Origin: Hpa-An, Myanmar Photo by kind permission of © www.americanthai.com, Scott Davies. |
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Amethyst
Weight: 7.32 ct Origin: Uruguay Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji. |
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Amethyst Mineral
Very rare Amethyst with a golden sheen Origin: Brandberg / Namibia Photo by kind permission of © www.rocksofafrica.com, Colin R. Owen. |
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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 Colors: yellow, purple, violet Largest cutted gemstone: at least 202 ct Deposits (source: www.mindat.org): 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 |
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Ametrine Mineral
Origin: Anahi Mine / Santa Cruz / Bolivia Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward. |
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Ametrine
Weight: 27.23 ct Origin: Bolivia Photo by kind permission of © www.multicolour.com, David Weinberg. |
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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 Colors: green, golden brown Fluorescence: reddish Pleochroism: - Largest Aventurine Quartz: ? Deposits: India, Brazil, Russia |
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Aventurine
Weight: 42.03 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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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): Cleavage: Colors: golden yellow, red, brown Luster: chatoyant Fluorescence: - Pleochroism: - Largest Binghamite: ? Deposits: Cuyuna North Range / Crow Wing County / Minnesota / USA Discovery: 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/, Alan Guisewite. |
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Formula Bloodstone (Heliotrope): 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: 6.75 - 6.0 Density (g/cm3): 2.59 - 2.65 Colors: green with red dots Fluorescence: - Pleochroism: - Largest Bloodstone: ? Deposits: Austria (Tirol), Czech Republic (Krkonoše), Russia (Ural), China, India, Australia, Brazil, USA |
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Bloodstone Mineral
Origin: India Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Bloodstone
Size: 1.35 x 1.09 cm Origin: Germany Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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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 Colors: reddish, brownish Fluorescence: blueish Pleochroism: - Largest Carnelian: ? Deposits: worldwide |
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Carnelian
Weight: 2.60 ct Origin: Mozambique Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Carnelian
Weight: 48.06 ct Origin: India Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Carnelian
Weight: 5,23 ct Origin: Madagascar Photo by kind permission of © www.thegemtrader.com, Brad Payne. |
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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 Colors: whiteish, yellowish, reddish, blueish, violet Fluorescence: blueish Pleochroism: - Largest Chalcedony: ? Deposits: Brazil, Uruguay, India, Madagascar, Namibia |
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Chalcedony Mineral
Origin: Hungary Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Chalcedony Mineral
Origin: Romania Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Chalcedony Mineral
Origin: Hungary Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Chalcedony
Weight: 12.52 ct Origin: Africa Photo by kind permission of © www.multicolour.com, David Weinberg. |
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Chalcedony
Weight: 2.53 ct Origin: Brazil Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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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, Dr. Laurent Sikirdji. |
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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 Colors: green Fluorescence: - Pleochroism: - Largest Chrysoprase: ? Deposits: Poland, Australia, Brazil, India, Madagascar, South Africa, Russia, USA |
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Chrysoprase Mineral
Size: 9.7 x 5.7 cm Origin: Poland Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pecsi. |
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Chrysoprase Mineral
Origin: Marlborough Mine / Queensland / Australia Photo by kind permission of © www.cs.cmu.edu/~adg/adg-piimages.html, Alan Guisewite. |
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Chrysoprase Mineral
Origin: Old Yerilla Mine / Australia Photo by kind permission of © www.TreasureMountainMining.com, Eric Greene. |
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Chrysoprase
Weight: 26.32 ct Origin: Tanzania Photo by kind permission of © www.multicolour.com, David Weinberg. |
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Chrysoprase
Size: 2.16 x 0.81 cm Origin: Australia Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Chrysoprase
Size: 1.46 x 0.71 cm Origin: Australia Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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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 Colors: light yellow - golden brown Fluorescence: - Pleochroism: slight: light yellow -yellow; burned Citrine: - Largest Citrine: ? Deposits: Brazil, Madagascar, USA, Spain, Russia, France, Scotland |
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Citrine
Weight: 37.52 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Citrine Mineral
Origin: Olkhovka / Ural / Russia Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Citrine
Weight: 22.37 ct Origin: Tanzania Photo by kind permission of © www.djraregems.com, Donna & John Rhoads. |
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Citrine Mineral
Origin: Minas Gerais / Brazil Photo by kind permission of © www.TreasureMountainMining.com, Eric Greene. |
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Citrine
Weight: 7.20 ct Origin: Bolivia Photo by kind permission of © www.multicolour.com, David Weinberg. |
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Citrine Mineral
Origin: Polar Region / Ural Mts. / Russia Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Citrine
Weight: 5.81 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Citrine
Weight: 9.48 ct Origin: Brazil Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji. |
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⇐ Intro Page ⇐ Gemstones
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Formula Jasper: SiO2
Diaspro, Jašma, Jasp, Jaspe, Jaspis, Яшма, ジャスパー, 风景玛瑙 Mineral class: oxides Crystal system: trigonal Mohs scale: 6.5 - 7.0 Density (g/cm3): 2.58 - 2.91 Colors: all colors Fluorescence: - Pleochroism: - Largest Jasper: ? Deposits: worldwide |
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Jasper Mineral
Size: 2.5 x 0.5 x 0.5 cm Origin: Fruita / Mesa County / Colorado / USA Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Jasper Mineral
Origin: Australia Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Jasper Mineral
Origin: South Africa Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi. |
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Jasper Mineral "Ocean Jasper"
Origin: Moravatu / Madagascar Photo by kind permission of © http://skywalker.cochise.edu, Roger Weller. |
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Jasper Mineral "Ocean Jasper"
Origin: Moravatu / Madagascar Photo by kind permission of © http://skywalker.cochise.edu, Roger Weller. |
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Jasper Mineral "Ocean Jasper"
Origin: Moravatu / Madagascar Photo by kind permission of © http://skywalker.cochise.edu, Roger Weller. |
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Jasper Mineral "Ocean Jasper"
Origin: Moravatu / Madagascar Photo by kind permission of © www.treasuremountainmining.com, Eric Greene. |
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Jasper "Ocean Jasper"
Origin: Moravatu / Madagascar Photo by kind permission of © http://skywalker.cochise.edu, Roger Weller. |
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Formula Prasiolite: SiO2
Prásio, Prasiolit, Prasiolith Mineral class: oxides Crystal system: trigonal Mohs scale: 7 Density (g/cm3): 2.65 Colors: light green, yellow-green Fluorescence: - Pleochroism: slight Largest Prasiolite: ? Deposits: Brazil, USA |
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Prasiolite
Weight: 2.08 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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Prasiolite
Weight: 11.67 ct Origin: Brazil Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Prasiolite
Weight: 23.46 ct Origin: Brazil Photo by kind permission of © www.multicolour.com, David Weinberg. |
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⇐ Intro Page ⇐ Gemstones
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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, Jasun McAvoy. |
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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, Dr. Robert Lavinsky. |
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Quartz Mineral (Hematite inclusions)
Size: 21.9 x 18.4 x 10.4 cm Origin: Jinkohe / Sichuan / China Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Quartz Mineral (blue)
Origin: Valle de Cauca / Colombia Photo by kind permission of © www.minerals-online.de, Dr. Marcus Lueg. |
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Quartz 2 colors
Weight: 13.26 ct Origin: Namibia Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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Quartz Star
Weight: 156.74 ct Origin: Brazil Photo by kind permission of © www.online-edelstein.de, Timo Klopp. |
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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 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, Eric Greene. |
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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, Eric Greene. |
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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 Colors: rose Fluorescence: slightly dark violet Pleochroism: slight: rose - light rose Largest Rose Quartz: ? Deposits: Brazil, Madagascar |
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Rose Quartz Mineral
Origin: Alto da Pitora / Galileia / Minas Gerais / Brazil Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward. |
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Rose Quartz
Weight: 20.53 ct Origin: Madagascar Photo by kind permission of www.gemfrance.com, Dr. Laurent Sikirdji. |
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Rose Quartz
Weight: 15.35 ct Origin: Brazil Photo by kind permission of www.irocks.com, Dr. Robert Lavinsky. |
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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, Sieghard Ellenberger. |
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Rose Quartz Star
Weight: 301.53 ct Origin: Brazil Photo by kind permission of www.online-edelstein.de, Timo Klopp. |
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Quartz 2 colors
Weight: 16.55 ct Origin: Brazil Photo by kind permission of © www.thegemtrader.com, Brad Payne. |
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⇐ Intro Page ⇐ Gemstones
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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 Colors: brown, black, grey Fluorescence: - Pleochroism: brown - reddish-brown Largest Smoky Quartz: ? Deposits: worldwide |
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Smoky Quartz Mineral
Origin: Mount Ida / Hot Springs / Arkansas / USA Photo by kind permission of © www.TreasureMountainMining.com, Eric Greene. |
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Smoky Quartz
Weight: 73.28 ct Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum. |
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Smoky Quartz
Weight: 4.67 ct Origin: Brazil Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky. |
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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 Colors: golden yellow - brownish Fluorescence: - Pleochroism: - Largest Tiger's Eye: ? Deposits: China, Namibia, South Africa, USA |
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Tiger's Eye Mineral
Origin: Northern Cape Province / South Africa Photo by kind permission of © António Manuel Ináçio Martins. |
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Tiger's Eye
Origin: South Africa Photo by kind permission of www.edelsteine.at, Wiener Edelsteinzentrum. |
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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, Donna & John Rhoads. |
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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, Thomas Pfneisl. |
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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, Thomas Pfneisl. |
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