Blue Dumortierite seldom occurs in crystals, here in fine small crystal druse. On quartz matrix. In Perky Box
Dimensions (millimeters): 25 x 20 x 15
Dimensions (inches): 1 x .75 x .6
Origins: Vaca Morta Quarry, Serra de Vereda, Bahia, Brazil, South America
Dumortierite is a fibrous aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system rarely forming crystals, as here. Dumortierite is commonly found in aluminum rich metamorphic rocks in contact metamorphic regions and in some pegmatites.
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