"PARKWAY PLASTICS, INC."

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Gray andesite with phenocrysts of felspar and/or hornblende.

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Dark brown to black; polycrystalline zinc ore.

Dark gray with abundant gas pocket vesicles.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.

Fightly cemented, medium-to-coarse quartz grains.

Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

A Standard and Electric Calorimeter in one.

Ideal for the colligate biological sciences student.

The perfect tool for investigation

Hands-On Manipulation with Colorful Models.

Abundant small black phenocrysts in a gray to brown matrix.

Light gray, fine small clasts.

Gray to white, coarse crystalline, carbonate rock.