"Freeze-Dried Specimens"

Light gray, fine small clasts.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Chlorite-bearing.

A variety of colorful collections to introduce rocks, minerals and fossils.

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

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

Typical green-gray, fissile, clay-rich.

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

Gray to white, coarse crystalline, carbonate rock.

Lustrous, black 'hard coal'.

Gray, fine, friable, with abundant small sanidine crystal fragments.

Grayish black trap rock.

Gray with line crinoid columnal fragments.

Glassy; most specimens float in water.

Shows porphyritic texture in a fine dark matrix abundant large feldspar phenocrysts. Hand specimen.