"PARKWAY PLASTICS, INC."

Dark brown to black; polycrystalline zinc ore.

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

Gray andesite with phenocrysts of felspar and/or hornblende.

White and black bands of quartz, feldspar, and biotite; typical foliation.

Hands-On Manipulation with Colorful Models.

Hands-on tool for scientific studies

Gray with line crinoid columnal fragments.

Grayish black trap rock.

Get crafty with the Bioplastic Kit: Strings and sequins™!

Brownish gray, translucent.

Spinel group; iron-black, massive; natural magnet.

See the clarity or turbidity of a water source.

Designed with Elementary Students in Mind!

Gray to white, coarse crystalline, carbonate rock.

Light gray, fine small clasts.

Abundant small black phenocrysts in a gray to brown matrix.