Charoite
The Charoite  deposit “Sirenevyi Kamen” has been known for less than 30 years, and this is the only location in the world where this material is found. It is located in Murun Mountains in Yakutia , Russia. Charoite was discovered by Russian geologist Vera P. Rogova and Yuri G. Rogov in the end of the 1950s, but only in 1978 the name “charoite” was confirmed by the Commission on New Mineral Species.
Charoite has a glorious purple color with the unique pattern of swirls, feathers and needles. It may contain patches of stars of black (Aegerine),orange (Tinaksite) and also transparent crystals (Microcline Feldspar). This material is actually a silicate of potassium, calcium and sodium.[K(Na Ca)11(Ba,  Sr)Si18046(OH,F)-nH2O] It ranks 5.0 in the Moh’s scale of hardness. Its destiny is approximately 2.5-2.8.
Do you know that: the fact the charoite was named after the Chara river in Yakutia may be wrong. The nearest bends of the Chara river are located about 70km from the occurrence.