"Freeze-Dried Specimens"

Brownish gray, translucent.

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

Yellow to orange crystal with a glassy luster and smooth, often transparent appearance.

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

Brown, earthy, massive; used for yellow pigment.

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.