Specimens

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.

Gray and poorly sorted, with a gritty texture.

Foliated biotite, coarse, silvery gray with quartz-feldspar bands.

Grayish black trap rock.

Shale is a rich, gray fissile clay rock.

Sale

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.