"WardsSci000451"

Pink/grey marble colored metamorphosed carbonate rock.

Green colored rock formed from the metamorphism of ultramafic mantle rocks.

Sale

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

Quartzite is hard, non-foliated rock formed from metamorphosed quartz sandstones.

Sale

Lustrous, black 'hard coal'.

Slaty cleavage; contains hematite.

Dark-green 'verde antique', containing some chlorite and calcite.