This is the Traditional Scale of Hardness Collection and a Test Kit. Includes Streak Plate, Coin, Glass Plates, Nail
and nine specimens 1" X 1.5" number coded. Country of Origin: USA

Set of 12

Specimens: Talc, Gypsum, Calcite, Fluorite, Apatite, Fedspar, Beryl, Corundum Diamond

Brand : American Educational Products