"Dessus de bouchon"

A classroom set that covers the major types of coal.

Exemplary display of hexoctahedral crystal shape.

Pure kaolinite powder, 200 mesh.

Classic “peacock” aluminum ore.

Light pink, massive, crystalline, translucent.

Deep purple crystal clusters.

Brown, earthy, massive; used for yellow pigment.

Nearly pure, green crystalline forsterite.

Pure, bright yellow, Frasch sulfur.

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

Pyroxene group; dark green, pure cleaved fragments.

Ward's® highest quality and purest mineral offerings.

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

Red, earthy, in natural chunk form; common pigment ore.

Cut black mica cleavage sheets.

Feldspar group; pink cleavages showing perthitic texture, common potassium feldspar, Mohs’ hardness of 6.