"Ward's Phenomena"

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

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

Coarse-grained plagioclase and pyroxene with some olivine.

Dark-green 'verde antique', containing some chlorite and calcite.

Dark gray with abundant gas pocket vesicles.

Earthy, porous calcareous tufa.

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

Pale pink felsite, with small sanidine phenocrysts.

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

Pink/gray coarse carbonate rock.

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

Ward's® Limestone (Dolomitic)

Sale

Dark, waxy, bitumin-rich.

Brownish black, intermediate stage between peat and bituminous coal.

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

Grayish black trap rock.