"PARKWAY PLASTICS, INC."

Learn To Use And Create Dichotomous Keys.

Bigger design for easy connections.

This set is economical, durable, and versatile.

Red-brown to gray, coarse-grained, containing feldspar and mica.

Gray, fine to medium-grained “Berea grit”.

Lens holder for 50 mm lenses or mirrors for use with Eisco Optical Bench.

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

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.

Reliable kit in a quality carrying case!

Gray with line crinoid columnal fragments.

Grayish black trap rock.

The perfect tool for investigation

Assign storage for each student in your Stem lab