"STEM kits"

Muscovite is a mica mineral cut to demonstrate basal cleavage.

Chert is a microcrystalline, hard, silica mineral.

Metamorphosed rock showing foliation and rich in hornblende.

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

Gray metamorphosed shale showing "slaty cleavage".

Pink/grey marble colored metamorphosed carbonate rock.

Phyllite is a light-gray foliated rock formed from metamorphosed slate.

Gray to tan clastic rock made of silt sized particles.

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

A textbook example of pure crystalline carbon which is extermely soft.