"Gary K. benson"

Nearly pure, green crystalline forsterite.

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; dark green, pure cleaved fragments.

Deep purple crystal clusters.

White, massive, coarse crystalline vein, Mohs’ hardness of 7.

Dark brown to black; polycrystalline zinc ore.

Pure, bright yellow, Frasch sulfur.

Cleaned, pure, bright, metallic native copper.

Great for geology hardness tests.

Specially selected thin sections of important rock forming minerals. Set may contain more than one example of the same mineral to depict variations in occurrence and distinct mineral associations.

Slides (12); annite, biotite, clinochlore, fuschite, glauconite, lepidolite, margarite, muscovite, paragonite, phlogopite, sericite, zinnwaldite.

Brown, fluorescent crystals intergrown in dolomite rock.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Amphibole group; black, coarse, massive.

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

Crystals and crystal sections up to 1", Mohs’ hardness of 9.