"Gary K. Besonson"

White, fine, massive, opaque to slightly translucent.

Teach your students about the complete metamorphosis of an insect with these mealworms.

Clear, pure cleavages, Mohs’ hardness of 2.

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

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

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

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.

A high bandwidth, high voltage 100x passive voltage probe with a 100 MΩ input impedance.

Light gray, fine-grained, well-foliated, schistose.

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

Coarse-grained, with microcline, biotite and horblende phenocrysts.