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Great South Gems & Minerals• Dumortierite (Brazil) •
• Dumortierite (Brazil) •Nesosilicates - Olivine - Tephroite - Phenakite - Willemite - Andalusite - Sillimanite - Kyanite - Topaz - Staurolite - Garnets - Zircon - Chondrodite - Titanite (Sphene) - DumortieriteDumortierite is a member of the Nesosilicates group of minerals which include Olivine, Tephroite, Phenakite, Willemite, Andalusite, Sillimanite, Kyanite, Topaz, Staurolite, Garnets, Zircon, Chondrodite, Titanite (Sphene), and Dumortierite. Hardness 7. Aluminum borosilicate. Dumortierrite occurs with quartz and andalusite in granite pegmatites, and with andalusite and muscovite in hydrothermal replacement deposits. The name is after Eugene Dumortier, 19th-century French paleontologist. Dumortierite is used as a semi-precious gemstone.
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