4x6mm Natural Kyanite Faceted Cut Oval 10 Pieces Lot - Natural Loose Gemstone - Blue Color Top Quality 4x6mm Natural Kyanite Faceted Cut Oval 10 Pieces Lot - Natural Loose Gemstone - Blue Color Top Quality Wholesale Lot For Sale Gemstone Name :- Natural Kyanite, Gemstone Shape :- Oval, Gemstone Cut:- Faceted Cut Gemstone Size :- 4x6mm, Gemstone Clarity :- Transparent, More Beautiful Than Picture Most gems are anisotropic to some extent, but kyanite is the most famous of anisotropic gemstones. its hardness can range from 4 to 4.5 on the Mohs scale, but when cut perpendicularly, its hardness can range from 6 to 7. Color may not appear exactly as in real life due to variation between computer monitor resolution and lights