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Gray to white, coarse crystalline, carbonate rock.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

Fightly cemented, medium-to-coarse quartz grains.

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

Grayish black trap rock.

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Buff-colored, coarse, detrital limestone, with cemented shell fragments.