"pathway PLASTICS, INC."

Cut black mica cleavage sheets.

Good grade, bronze-colored ore, massive.

Pink/gray coarse carbonate rock.

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

White, fine, massive, opaque to slightly translucent.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Gray, fine, friable, with abundant small sanidine crystal fragments.

Nearly pure, green crystalline forsterite.

Brownish gray, kerogen-rich; commercial oil source.

Glassy; most specimens float in water.

Hardened natural cement of calcium carbonate that binds other material such as gravel, sand, clay, and silt.

Pale pink felsite, with small sanidine phenocrysts.

Simulated silicone specimen, designed for modern learning.

Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.

Dark gray, composed mostly of pyroxene and olivine.

Mica group; cut sheets showing basal cleavages. Books and sheets in bulk pack.