"pathway PLASTICS, INC."

Gray-to-brown basaltic, with over 50% vesicles.

Gray to brown mudstone with abundant silt.

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.

Massive, chlorite-rich.

Good grade, green, massive; copper ore.

Brownish black, intermediate stage between peat and bituminous coal.

Deep blue, massive, with nepheline; key feldspathoid.

Red, classic oolitic texture.

Slaty cleavage; contains hematite.

White, mature, friable.

Coarse-grained plagioclase and pyroxene with some olivine.

Pink/gray coarse carbonate rock.

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