"Freeze-Dried Specimens"

Brownish gray, translucent.

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

Brown, earthy, massive; used for yellow pigment.

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”.