"Freeze-Dried Specimens"

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

Sale

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 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.