"gel box"

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.

Good grade, green, massive; copper ore.

Red, classic oolitic texture.

Nearly pure, green crystalline forsterite.

Pure, bright yellow, Frasch sulfur.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

Black, Micaceous, glittery metallic.

White, fine, massive, opaque to slightly translucent.

Amphibole group; black, coarse, massive.