"pathway PLASTICS, INC."

Small, rounded pebbles and tightly cemented granules.

Brownish gray, kerogen-rich; commercial oil source.

Brown, fluorescent crystals intergrown in dolomite rock.

Brown, earthy, massive; used for yellow pigment.

Simulated silicone specimen, designed for modern learning.

Classic “peacock” aluminum ore.

Silvery, paragranite and muscovite-rich with medium garnet crystals.

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

White, fibrous, silky luster.

Gray, fine-grained, massive contact rock.

Fine to medium-grained with biotite.

Gray to buff, with numerous ooliths and fossil fragments.

Clear, pure cleavages, Mohs’ hardness of 2.

Gray to white, coarse crystalline, carbonate rock.

Classic, dark; from the Columbia Plateau.

Pure, white, earthy “China clay”.