"The Mystery of Lyle and Louise"

Chlorite-bearing.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Brownish black, intermediate stage between peat and bituminous coal.

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

Lustrous, black 'hard coal'.

Chlorite-mica with perfect slaty cleavage.

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Typical green-gray, fissile, clay-rich.

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

Red-brown to gray, coarse-grained, containing feldspar and mica.

Silvery, paragranite and muscovite-rich with medium garnet crystals.

Dark, waxy, bitumin-rich.

Gray to white, coarse crystalline, carbonate rock.

Fine crystalline, pure calcite.

Dark gray with abundant gas pocket vesicles.

Gray and poorly sorted, with a gritty texture.