"pathway PLASTICS, INC."

Students discover the variety of rocks and minerals with this collection.

This collection with rock types and associations with the North American continent contains 100 specimens with each group represented: igneous, metamorphic, and sedimentary. Specimens are approximately 1"" x 1"", number-coded in compartmented container.

Fine crystalline, pure calcite.

Classic, very coarse-grained igneous texture.

Hematite-cemented quartz; orthoquartzite.

Chlorite-bearing.

Light gray, fine-grained, well-foliated, schistose.

Gray-to-brown basaltic, with over 50% vesicles.

Massive, chlorite-rich.

Gray to brown mudstone with abundant silt.

Dark gray, with hornblende as the dominant mafic mineral.

Typical green-gray, fissile, clay-rich.

Well-cemented, medium-grained orthoquartzite.

Brownish black, intermediate stage between peat and bituminous coal.

Slaty cleavage; contains hematite.

White, mature, friable.