"gel box"

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

Amphibole group; black, coarse, massive.

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

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

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

Classic “peacock” aluminum ore.

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

White, fibrous, silky luster.

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