"STEM kits"

Earthy, yellow brown iron ore.

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.

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

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.

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