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|Dimensions (mm)||52 x 48 x 8mm|
|Weight (carats)||235 carats|
This is a natural untreated slab which is transparent and showing colours of mauve and purple. Mined in Turkey.
We have taken both sides of the stones and the pictures are wet.
Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, . Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartzcontaining abundant dumortierite inclusions
Gorgeous colour with great translucency. Lovely pieces, couple of flaws, but will keep one as specimen & freeform polish the others to set. And Thanks for the little Pyrite gift- though it looks more like Chalcopyrite??.
|Starts||2nd Sep 2015 5:25pm PDT|
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