Cordierite (Iolite, Dichroite)
Cordieriet, Cordierit, Cordiérite, Kordieriitti, Kordieryt, Кордієрит, קורדיאריט, 菫青石, کوردیریت
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula: Mg2Al3[AlSi5O18]
Mineral class: silicates Crystal system: rhombic Mohs scale: 7 - 7.5 Density (g/cm3): 2.55 - 2.75 Refractive index: 1.522 - 1.578 Cleavage: fair - poor Colors: colorless, yellow, brown, blue, violet Luster: vitreous Fluorescence: - Pleochroism: strong: yellow - blue Largest Cordierite: 50 cm (La Fuenfria / Robledo de Chavala / Sierra da Guadarrama / Kastilia / Spain) Deposits: Brazil, Sri Lanka, Myanmar, India, Madagascar, Spain Discovery: 1813 1st Description: 1892 Name: in honor of the French mineralogist Pierre Louis Cordier (1777 - 1861) |
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Cordierite
Weight: 2.79 ct Origin: Embilipitiya / Sri Lanka Photo by kind permission of © www.thegemtrader.com |
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Cordierite Mineral
Size: 5 cm Origin: Richmond Soapstone Quarry / Richmond / Cheshire County / New Hampshire / USA Photo by kind permission of © www.irocks.com |
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Cordierite Mineral
Size: Micromount Origin: Ettringer Bellerberg Mt. / Ettringen / Eifel Mts./ Rhineland-Palatinate / Germany Photo by kind permission of © Stephan Wolfsried |
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Cordierite
Weight: 1.68 ct Size: 0.8 cm Origin: Madagascar Photo by kind permission of © www.kox-gems.com |
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Cordierite Pleochroism
Size: 1.1 x 0.9 x 0.8 cm Origin: Madagascar Photo by kind permission of © www.lucianabarbosa.com |
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Cordierite
Weight: 3.97 ct Size: 1.2 x 1.0 cm Origin: India Photo by kind permission of © www.kox-gems.com |
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Cordierite Mineral
Size: 1.8 x 0.8 x 0.6 cm Origin: Coroaci / Minas Gerais / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Cordierite
Weight: 0.89 ct Origin: Mogok / Mandalay Div. / Myanmar Photo by kind permission of © www.crystal-treasure.com |
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Cordierite Mineral
Size: Micromount Origin: Nickenicher Sattel / Laacher See area / Eifel Mts. / Rhineland-Palatinate / Germany Photo by kind permission of © Stephan Wolfsried |
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Cordierite Mineral
Size: Micromount Origin: Laacher See area / Eifel Mts. / Rhineland-Palatinate / Germany Photo by kind permission of © Stephan Wolfsried |
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Cordierite Cat's Eye
Weight: 2.35 ct Origin: India Photo by kind permission of © www.thegemtrader.com |
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Cordierite Cat's Eye
Size: 1.03 x 0.80 x 0.60 cm Weight: 3.61 ct Origin: India Photo by kind permission of © www.djraregems.com |
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Cordierite Cat's Eye
Size: 1.14 x 1.07 cm Weight: 6.24 ct Origin: India Photo by kind permission of © www.minclassics.com |
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Cordierite Cat's Eye
Weight: 8.41 ct Origin: Sri Lanka Photo by kind permission of © www.online-edelstein.de |
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Cordierite Cat's Eye
Weight: 48.20 ct Origin: Sri Lanka Photo by kind permission of © www.online-edelstein.de |
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Cordierite Cat's Eye
Size: 1.23 x 0.91 cm Weight: 5.29 ct Origin: India Photo by kind permission of © www.minclassics.com |
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Cordierite Trapiche Mineral
"Sakura Ichi" ("Cherry Blossom Stone")
Size: 0.4 cm Origin: Kameoka / Kyoto Pref. / Japan Photo by kind permission of © www.rocklogic.biz |
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Cordierite Trapiche Mineral
"Sakura Ichi" ("Cherry Blossom Stone")
Size: 0.7 cm Origin: Kameoka / Kyoto Pref. / Japan Photo: Andre Mongeon, by kind permission of © Stephanie Martin and Kitchener-Waterloo Gem and Mineral Club |
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Cordierite Trapiche Mineral
"Sakura Ichi" ("Cherry Blossom Stone")
Size: 0.6 - 0,8 cm Origin: Kameoka / Kyoto Pref. / Japan Photo: Andre Mongeon, by kind permission of © Stephanie Martin and Kitchener-Waterloo Gem and Mineral Club |
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