Charote
Murun
Siberia, Russia
This polished slab measures 12cm x 21cm
Charote K(Ca,Na)2Si4O10(OH,F).H20
Silicates, complex chain silicate; precise structure unknown, used as a semi-precious gemstone in lapidary work
Color and Luster: usually violet to lilac, vitreous to silky
Hardness:5-6
Cleavage: 3 directions
Fracture: not reported
Crystals: Monoclinic or orthorhombic, this specimen occurs in Murun syenite massifs
Photo by Lance Kearns
Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals