"gel box"

Nearly pure, green crystalline forsterite.

Pure, bright yellow, Frasch sulfur.

Red, classic oolitic texture.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

White, fine, massive, opaque to slightly translucent.

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.

Pure, white, earthy “China clay”.