"pathway PLASTICS, INC."

Dark gray, with hornblende as the dominant mafic mineral.

Typical green-gray, fissile, clay-rich.

Himalayan mineral great for teaching and display.

Well-cemented, medium-grained orthoquartzite.

Medium-grained with biotite.

Coarse-grained plagioclase and pyroxene with some olivine.

Pink/gray coarse carbonate rock.

Nearly pure, green crystalline forsterite.

Pale pink felsite, with small sanidine phenocrysts.

Coarse-grained, with microcline, biotite and horblende phenocrysts.

White, fine, massive, opaque to slightly translucent.

Glassy; most specimens float in water.

Brownish gray, kerogen-rich; commercial oil source.

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

Bright metallic cubic cleavages; lead ore.

Simulated silicone specimen, designed for modern learning.