"Freeze-Dried Specimens"

Light gray, fine small clasts.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

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

Black, soft; most widely mined.

Pale pink felsite, with small sanidine phenocrysts.

Gray to white, coarse crystalline, carbonate rock.

Dark gray with abundant gas pocket vesicles.

Lustrous, black 'hard coal'.

Volcanic glass with snowflakes embedded throughout.