"Freeze-Dried Specimens"

Lustrous, black 'hard coal'.

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.

Sale

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

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

Grayish black trap rock.

Sale

Gray with line crinoid columnal fragments.