various raw white and colorless stones with names

agate anhydrite background cacholong calcite carbonatite castorite chalk chalkstone clear collage collection crystal cut cutout description diorite gneiss gray gypsum iceland isolated kascholong limestone marble migmatite mineral name natural okenite opal out petalite prehnite quartz raw rhinestone rock rockcrystal rough sample scheelite scolecite set spar specimen stone unpolished various white xonotlite