Rocks And Minerals
28 entries in the Rocks And Minerals compendium.
DaciteIntermediate volcanic rock between andesite and rhyolite.DioriteAn intrusive igneous rock intermediate between gabbro and granite.GabbroCoarse-grained, mafic intrusive rock forming much of Earth's oceanic crust.GranodioriteCoarse-grained intrusive rock intermediate between granite and diorite.GranuliteHigh-grade metamorphic rocks representing deep continental crust.GreywackeA dark, hard sandstone formed by ancient submarine avalanches.GreenschistA green, foliated metamorphic rock from low-grade regional metamorphism.GreisenAltered granite formed by late-stage magmatic fluids, often tin-bearing.HornfelsBaked, hard, fine-grained contact metamorphic rock named for horn-like toughness.HornblendeA dark amphibole mineral series common in igneous and metamorphic rocks.DiopsideA pyroxene mineral found in mantle rocks and used as a diamond indicator.EnstatiteMagnesium-rich pyroxene mineral found in rocks, meteorites, and space.EpidoteA rock-forming sorosilicate mineral with strong pleochroism.ErythriteSecondary cobalt arsenate mineral used as a prospecting guide.FayaliteIron-rich olivine end-member stable with quartz at low pressure.FluorapatiteMost common phosphate mineral, used in teeth and fluorescent lighting.FluoriteMineral that gave its name to fluorescence and fluorine.ForsteriteMagnesium-rich end-member of the olivine solid solution series.GalenaPrimary ore of lead and silver, widely distributed sulfide mineral.GreenockiteGreenockite, sometimes called cadmium blende or, historically, cadmium ochre, is an uncommHaliteMineral form of sodium chloride, used for salt and de-icing.HauyneRare blue feldspathoid mineral of the sodalite group.HedenbergiteIron-rich pyroxene found in chondrites and skarns.HematiteIron oxide mineral used as ore, pigment, and in jewelry.HemimorphiteA zinc silicate mineral once confused with smithsonite as calamine.Dolomite (mineral)A carbonate mineral with a complex formation history and wide industrial use.Dolomite (rock)Sedimentary carbonate rock named after French geologist Déodat Gratet de Dolomieu.FlintA cryptocrystalline quartz used for tools, fire, and firearms.
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