"Freeze-Dried Specimens"

Powdered bentonite clay 200 mesh, sodium saturated.

Sale

Talc is the softest know mineral with a moh's hardness of 1, and composed of clay.

Sale

Massive sedimentary gypsum with a moh's hardness 2..

Light pink, massive, crystalline, translucent.

Sale

Earthy, yellow brown iron ore.

Massive white quartz with a moh's hardness 7.

This coloful mix of naturally colored polished stones are available in a variety of tumbled sizes. 1 lb. package.

Feldspar group; blue-green, microcline, triclinic, ³/₄". Colorado.