"gel box"

Fine crystalline, pure calcite.

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

Slaty cleavage; contains hematite.

Light gray, fine-grained, well-foliated, schistose.

Lustrous, black 'hard coal'.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

Perfect for Introductory Lessons on Metamorphic Rocks.