"Gary K. Besonson"

White, fine, massive, opaque to slightly translucent.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

Brown, fluorescent crystals intergrown in dolomite rock.

Accessories for Innovating Science® Acid, Caustic and Solvent Spill Kit

Spinel group; iron-black, massive; natural magnet.

A set of five slotted iron masses with hanger.

Set of 9 slotted masses with a hanger, made of powder-coated, die-cast zinc and stamped for easy identification.

Good grade, brass-yellow copper ore, massive.

Black, fissile; commonly with carbonized fossil plant impressions.

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

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.

Deep purple crystal clusters.

Cut black mica cleavage sheets.

Well-cemented, medium-grained orthoquartzite.