workmanship is amazing
|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
MINERAL GEM WORLD
KORNERUPINE ROUGH CRYSTALS
This is a nautral untreated specimen of a rare Kornerupien.
Weight 1.12 cts app
Size 6 x 6 x 5 mm app
Kornerupine is a rare boro-silicate mineral. It crystallizes in the orthorhombic - dipyramidal crystal system as brown, green, yellow to colorless slender tourmaline like prisms or in massive fibrous forms. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.34. Its indices of refraction are nα=1.660 - 1.671, nβ=1.673 - 1.683 and nγ=1.674 - 1.684.
It occurs in boron-rich volcanic and sedimentary rocks which have undergone high grade metamorphism. It is also found in metamorphosedanorthosite complexes.
The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.
|Starts||18th Jun 2013 7:43pm PDT|
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