"Freeze-Dried Specimens"

Amphibole group; dark greenish black cleavages, somewhat columnar.

Pure kaolinite powder, 200 mesh.

White, fibrous, silky luster.

Spinel group; iron-black, massive; natural magnet.

Classic “peacock” aluminum ore.

Small 1–1.5 mm crystal, octahedrans or cubes, Mohs” hardness of 10.

Classic, white chalk, massive; from Cliffs of Dover, England.

Great for geology hardness tests.

Dark brown to black; polycrystalline zinc ore.

Exemplary display of hexoctahedral crystal shape.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

Brown, fluorescent crystals intergrown in dolomite rock.

Black, high grade, foliated, greasy feel.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

Clear, euhedral points and sections.

Gemmy, sherry-colored crystals and sections approximately 3/8– 1/2"