"bouteille de gaz"

Pure, white, earthy “China clay”.

A classroom set that covers the major types of coal.

Exemplary display of hexoctahedral crystal shape.

Pure kaolinite powder, 200 mesh.

Deep purple crystal clusters.

Classic “peacock” aluminum ore.

Light pink, massive, crystalline, translucent.

Nearly pure, green crystalline forsterite.

Pure, bright yellow, Frasch sulfur.

Brown, earthy, massive; used for yellow pigment.