"gel box"

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.

You can own one of the oldest and rarest meteorites of lunar origin.

A Complete Kit to Communicate the Concept of Hardness in Minerals

Samples of Minerals That Are Found in Rocks

Examples of Different Forms of Breakage in Minerals

Geometric Shapes and Structures of Crystalline Minerals.

Give Your Students a Lesson in Economics as Well as Geology

Good grade, green, massive; copper ore.

Nearly pure, green crystalline forsterite.

Red, classic oolitic texture.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

Black, Micaceous, glittery metallic.

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

White, fine, massive, opaque to slightly translucent.

Amphibole group; black, coarse, massive.