ID Chart - MOHS Hardness Scale - Rock and Mineral Collection

Great earth science resource - Chart with samples on the Mohs Hardness Scale Includes numbers 1-9 (all except diamond) Specific samples included are Talc, Gypsum, Calcite, Fluorite, Apatite, Feldspar, Quartz, Topaz, Corundum Wonderful for Science Fair presentations on Rocks, Minerals or Geology The chart measures 8 1/2" x 5 1/4" with samples affixed to a sturdy card with ziplock protective plastic covering Includes 9 genuine rocks/minerals/gemstones that are one through nine on the Mohs Hardness Scale. The Moh's scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.