"WardsSci000451"

White, very dark green, and very dark red to light red granoblastic intergrowth of wollastonite, diopside, and andradite.

Pink and gray bands, with biotite; shows good foliation.

Fine crystalline, pure calcite.

Slaty metamorphic rock containing hematite giving it its red color.

Sale

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

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

Sale

Slaty cleavage; contains hematite.

Lustrous, black 'hard coal'.

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