"Freeze-Dried Specimens"

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

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.

Gray to white, coarse crystalline, carbonate rock.

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.