"Freeze-Dried Specimens"

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Represents a Wide Range of Depositional Environments and Rock Textures

Sale

Indicative of Various Sedimentary Formation Processes

Earthy, porous calcareous tufa.

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

4 pounds of limestone chips supplied in a box.

White, mature, friable.

Red clastic rock composed of sand sized particles and hematite.

Sale

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