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Geometric Shapes and Structures of Crystalline Minerals.

Give Your Students a Lesson in Economics as Well as Geology

Visual examples of genetics at work.

Everything You Need to Organize Your Specimens

Good grade, green, massive; copper ore.

Nearly pure, green crystalline forsterite.

Massive, chlorite-rich.

Red, classic oolitic texture.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

Gray to white, coarse crystalline, carbonate rock.

Classic, dark; from the Columbia Plateau.

Fightly cemented, medium-to-coarse quartz grains.

Black, Micaceous, glittery metallic.

Medium-grained with biotite.

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