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7 terms

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Sillicates
most common 90% made of oxygen and silicon, varying hardness, not dense. Garnet, Rose Quartz, Zircon, Amethyst, Muscovite, Quartz, Biotite, Tourmaline, Emerald, Topaz, Tale
Oxides
Oxygen and a metal, they have a high density and a dark color. i.e, Limorite, Magnetite, Sapphire, Ruby, Hematite
Carbonate
Metal,Carbon,and Oxygen, low hardness, react in acid i.e Calcites, Dolomites, Malachites, Azurites
Sulfides
sulfur and a metal, distinctive streak, metallic luster, mid to low hardness, high density i.e Galena, Pyrite
Sulfates
sulfur and oxygen with a metal, low hardness i.e Gypsums
Halides
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