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Glittering
Stones >> Semi
Precious Stones >> Dumortierite
Semi Precious Stone Dumortierite
Dumortierite a fibrous variably colored aluminium boro silicate
mineral described first in 1881 in chaponost. The mineral typically
occurs in the high temperature aliuminium rich regional metamorphic
rocks. The exiting colors of the gemstone are brown, blue, green
to rare violet, pink and still more. The Mohs scale hardness of
dumortierite is 8.5 and the specific gravity is 3.3 to 3.4 and
the crystals are vitreous.
The occurrence of the mineral can be found in Austria, Canada,
France, Italy, Madagascar, Namibia, Nevada, Poland, Sri Lanka
and Norway. Dumortierite is the blue colored quartz containing
abundant dumortierite inclusions.
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Historical Facts of Dumortierite
| Refractive Index |
1.659 - 1.692 |
| Chemical Composition |
Al6.5 - 7(BO3)(SiO4)3(O, OH)3 |
| Hardness |
7 - 8.5 |
| Density |
3.3 - 3.4 |
| Crystal Group |
Orthorhombic |
| Color |
Red, Blue, Violet, Pink, Brown |
| Ocurrence |
France, Russia, Magadanskaya, Siberia,
Madagascar, Tanzania |
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Gem Stone Dumortierite Jewelry
| Dumortierite Bracelet |
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| Dumortierite Earrings |
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| Dumortierite Necklace |
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| Dumortierite Rings |
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