"Ward's Phenomena Lab Activities"

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

Coarse-grained, with microcline, biotite and horblende phenocrysts.

Fine, common limestone; massive, and will fizzle with HCl.

Pale pink felsite, with small sanidine phenocrysts.

Pink/gray coarse carbonate rock.

Gray, fine to medium-grained “Berea grit”.

Dark, waxy, bitumin-rich.

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.

Lustrous, black 'hard coal'.