Set includes Color (Malachite and Azurite, 25X) Streak (Pyrite, 1X vs Gold, 2X), Hardness (Quartz vs Fluorite, 1X), Luster (Turquoise, 5X, Asbestos 5X, and Sphalerite 25X), Form and Crystal Structure (Malachite, 5X vs Proustite, 40X), Cleavage and Fracture (Galena, 5X vs Obsidian, 1X), Chemical Properties (Acid on Calcite, 35X), and Special Properties (UV Luminescence, 0.8X).
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