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most common 90% made of oxygen and silicon, varying hardness, not dense. Garnet, Rose Quartz, Zircon, Amethyst, Muscovite, Quartz, Biotite, Tourmaline, Emerald, Topaz, Tale


Oxygen and a metal, they have a high density and a dark color. i.e, Limorite, Magnetite, Sapphire, Ruby, Hematite


Metal,Carbon,and Oxygen, low hardness, react in acid i.e Calcites, Dolomites, Malachites, Azurites


sulfur and a metal, distinctive streak, metallic luster, mid to low hardness, high density i.e Galena, Pyrite


sulfur and oxygen with a metal, low hardness i.e Gypsums


Metal and Fluorine or Chlorine, low hardness, poor conductors i.e Halites and Fluorites

Native Elements

Single Elements, lots of variation i.e Gold, Silver, Iron, Sulfur, Diamond, Copper, Platinum, Graphite

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