BLUE KYANITE CRYSTAL 7
Beautiful rough Large Blue Kyanite Crystal 7 from Nepal! Himalayan Kyanite is some of the best in the world, this is a good sized natural crystal. Perfect for jewellery making or as a specimen and great healing properties too. The pink pic shows fluorescence with UVA lighting.
Kathmandu Valley, Nepal.
5.4cm x 1.5cm x 1.1cm, 20g.
Kyanite Al2 SiO5.
The mineral Kyanite is a polymorph with two minerals, Andalusite and Sillimanite. It has a unique characteristic in that it has a wide variation in hardness. When scratched parallel to the long axis of the crystal, the hardness of Kyanite is 4.5. When scratched perpendicular to the axis it is approximately 6.5.