"Freeze-Dried Specimens"

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.

Fine crystalline, pure calcite.

Fightly cemented, medium-to-coarse quartz grains.

Gray to brown mudstone with abundant silt.

Massive, chlorite-rich.

Gray to buff, with numerous ooliths and fossil fragments.

Gray, fine-grained, massive contact rock.

Chlorite-mica with perfect slaty cleavage.

Dark gray with abundant gas pocket vesicles.

Gray and poorly sorted, with a gritty texture.

Pale pink felsite, with small sanidine phenocrysts.

Volcanic glass with snowflakes embedded throughout.

Typical green-gray, fissile, clay-rich.

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