"PARKWAY PLASTICS, INC."

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

High Quality for the Classroom.

Ideal for the colligate biological sciences student.

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

Spinel group; black, dull metallic luster; common iron oxide.

They are made from high quality TPX, making them easy to read with excellent contact clarity.

Useful for individual or group study of molecules, these model sets offer an interactive learning opportunity.

Abundant small black phenocrysts in a gray to brown matrix.

Light gray, fine small clasts.

Gray to white, coarse crystalline, carbonate rock.

Inexpensive yet accurate.

Cool and colorful dragons liven up genetics lessons.

For More Realistic Precipitation

These pocket magnifiers are economical enough to outfit an entire class.

Economy Color-Coded Spring Scales

Twelve of the most widely used weights on a rack for convenient storage and transport.