Kammererite

Kammererite – Mg₅(Al,Cr)(AlSi₃O₁₀)(OH)₈
Class: Silicates – Phyllosilicates
Crystal System: Monoclinic
Hardness: 2-2.5
Gypsum
Talc (1)Diamond (10)
Soft. A fingernail can scratch it.
Origin: Kop, Krom Mine, Kop Daglari Erzurum Province – Turkey