Dumortierite
Dumortieriet, Dumortierit, Dumortierita, Dumortieryt, Дюмортьерит, 藍綫石
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula: Al7[O3/BO3/(SiO4)3]
Mineral class: silicates Crystal system: rhombic Mohs scale: 7 Density (g/cm3): 3.26 - 3.41 Refractive index: 1.678 - 1.723 Cleavage: distinct - poor Colors: greenish, blue, violet, brownish Luster: vitreous - dull Fluorescence: slight Pleochroism: strong: black - brown Largest Dumortierite: 6 cm? Deposits: Brazil, Canada, France, Madagascar, Myanmar, Namibia, Poland, Sri Lanka, USA 1st Description: 1892 Name: in honor of the French paleontologist Eugène Dumortier (19th Century) |
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Dumortierite Mineral
Size: 0.6 x 0.5 x 0.2 cm Origin: Vaca Morta Quarry / Boquira / Serra da Vereda / Bahia / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Dumortierite
Weight: 0.20 ct Size: 0.4 x 0.3 x 0.2 cm Origin: Vaca Morta Quarry / Boquira / Serra da Vereda / Bahia / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Dumortierite
Size: 0.6 x 0.51 cm Weight: 0.40 ct Origin: Brazil Photo by kind permission of © www.thegemtrader.com |
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Dumortierite
Weight: 0.18 ct Origin: Bahia / Brazil Photo by kind permission of © http://lucianabarbosa.com |
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Dumortierite
Size: 1.21 cm Weight: 7.87 ct Origin: Ambositra Distr. / Fianarantsoa Prov. / Madagascar Photo by kind permission of © www.irocks.com |
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Dumortierite
Size: 0.5 x 0.4 x 0.2 cm Weight: 0.35 ct Origin: Vaca Morta Quarry / Boquira / Serra da Vereda / Bahia / Brazil Photo by kind permission of © www.lucianabarbosa.com |
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Dumortierite
Size: 0.26 cm Weight: 0.08 ct Origin: Madagascar Photo by kind permission of © www.irocks.com |
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Dumortierite
Size: 0.5 x 0.2 x 0.1 cm Weight: 0.17 ct Origin: Vaca Morta Quarry / Boquira / Serra da Vereda / Bahia / Brazil Photo by kind permission of © http://lucianabarbosa.com |
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Dumortierite Mineral
Weight: 0.39 ct Origin: Ohngaing / Mogok / Myanmar Photo by kind permission of © www.crystal-treasure.com |
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Dumortierite
Weight: 2.55 ct Origin: Africa Foto mit freundlicher Erlaubnis von © www.multicolour.com |
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