"Avantor"

Good grade, green, massive; copper ore.

Mica group; cut sheets showing basal cleavages. Books and sheets in bulk pack.

Fresh Green forsterite, classic “twin sisters” dunite.

Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

Pyroxene group; gray-green, coarse crystalline.

Good grade, bronze-colored ore, massive.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

Clear, euhedral points and sections.

Pure, bright yellow, Frasch sulfur.

Gemmy, sherry-colored crystals and sections approximately 3/8– 1/2"

Cleaned, pure, bright, metallic native copper.

Massive, chlorite-rich.

Well-cemented, medium-grained orthoquartzite.

Chlorite-bearing.

Dark, coarse-grained, and composed chiefly of hornblende.

Gray andesite with phenocrysts of felspar and/or hornblende.