"gel box"

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

Amphibole group; black, coarse, massive.

Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

White, fibrous, silky luster.

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

Spinel group; black, dull metallic luster; common iron oxide.

White, massive, coarse crystalline vein, Mohs’ hardness of 7.

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.