Barylite tilasite 2.23cts Great Ultraviolet Gem Stone Hex Cut 9.30 x 9.30mm g0246
Barylite is a rare Berillium,Barium silicate with formula Be2Ba(Si2O7) and hardness of 7.
Tilasite is a Magnesium Calcium arsenate and fluoride with formula CaMg(AsO4)F and hardness of 5.Is mixed with small parts of Richterite.The barylite is pinkish in the white matrix of Tilasite.
It is found in Langban,Filipstad,Warmland,Sweden
Fluorescent on short wave.