Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
Subconchoidal, Conchoidal
Ca 6Si 2(CO 3) 2(SO 4) 2(OH) 12 · 24H 2OUlrich Henn and Claudio C.