"pathway PLASTICS, INC."

Hardened natural cement of calcium carbonate that binds other material such as gravel, sand, clay, and silt.

Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.

Mica group; cut sheets showing basal cleavages. Books and sheets in bulk pack.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

Clear, pure cleavages, Mohs’ hardness of 2.

Pure, bright yellow, Frasch sulfur.

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

White, fibrous, silky luster.

Classic “peacock” aluminum ore.

Black, Micaceous, glittery metallic.

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

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

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

Dark brown to black; polycrystalline zinc ore.