Good price on these!

M899 - Selenite "Rose", Mexico.

Hydrous calcium sulfate. Hardness 1-1/2 to 2. (Can be scratched with the fingernail!) Prismatic and tabular crystals. Also called "Desert Rose", "Gypsum Rose", and "Sandrose". The material forms in desert areas by the evaporation of rising groundwater.

From Mexico.

Weight
Small: about .20
Medium: about .50
Large: about .80