"role ENTERPRISES, INC."

Gray metamorphosed shale showing "slaty cleavage".

Muscovite is a mica mineral cut to demonstrate basal cleavage.

Gray to white metamorphosed carbonate rock.

Chert is a microcrystalline, hard, silica mineral.

Gray to tan clastic rock made of silt sized particles.

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

Pink/grey marble colored metamorphosed carbonate rock.

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

Massive white quartz with a moh's hardness 7.

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