"Freeze-Dried Specimens"

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

Brown, earthy, massive; used for yellow pigment.

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.

Pure translucent to white, rhombic cleavages, Mohs’ hardness of 3.

Nearly pure, green crystalline forsterite.

Light pink, massive, crystalline, translucent.

Deep blue, massive, with nepheline; key feldspathoid.

A classroom set that covers the major types of coal.

Crystals and crystal sections up to 1", Mohs’ hardness of 9.

White, fine, massive, opaque to slightly translucent.

Red, classic oolitic texture.

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

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

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Amphibole group; black, coarse, massive.