"physics kits"

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

Coarse-grained, with microcline, biotite and horblende phenocrysts.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Porphyritic igneous rock containing biotite, feldspar, and hornblende.

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

Gray to white metamorphosed carbonate rock.

Muscovite is a mica mineral cut to demonstrate basal cleavage.

Gray metamorphosed shale showing "slaty cleavage".

Gray to tan clastic rock made of silt sized particles.

Gabbro is Mafic igneous rock formed deep underground consisting of olivine and pyroxene.