"College - Geology"

A favorite of collectors for over 50 years.

Gray metamorphosed shale showing "slaty cleavage".

Kaolin is a white clay mineral that has vast industrial uses

Sale

Metamorphosed rock showing foliation and rich in hornblende.

Hemalite is a Massive, dense red to gray, classic example of iron ore.

Porphyritic igneous rock containing biotite, feldspar, and hornblende.

Pegmatite is igneous rock similar to granite but with larger crystals.

Sale

Pumice is light colored glassy rock that floats in water.

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

Muscovite is a mica mineral cut to demonstrate basal cleavage.