Minerals & Crystals 1-24
23 entries in the Minerals & Crystals compendium.
AgateBanded chalcedony gemstone, popular for millennia.AlbiteSodium endmember of the plagioclase feldspar series.AllaniteA rare-earth-bearing sorosilicate mineral in the epidote group.AluniteA potassium-aluminum sulfate mineral historically mined for alum.AmphiboleA group of double-chain silicate minerals forming prismatic crystals.AnataseMetastable titanium dioxide mineral with unique crystal habit.AndalusiteAluminosilicate index mineral used as a refractory and gemstone.AnhydriteAnhydrous calcium sulfate mineral found in evaporite deposits.AnorthiteCalcium endmember of plagioclase feldspar, rare on Earth but abundant on the Moon.ApatiteA phosphate mineral group essential to biology and industry.AragoniteA metastable calcium carbonate mineral forming in diverse environments.ArsenopyriteA hard, metallic ore of arsenic and gold indicator.AugiteA common pyroxene mineral with monoclinic crystals and near-90-degree cleavage.AzuriteA deep-blue copper mineral used as pigment since antiquity.BaryteBaryte is the main source of barium and a key drilling mud additive.BastnäsiteA key rare-earth fluorocarbonate mineral and major cerium source.BiotiteA common dark mica group, formerly a mineral species.BorniteAn iridescent copper ore named for mineralogist Ignaz von Born.BrookiteOrthorhombic titanium dioxide polymorph, rare and photocatalytic.BruciteMagnesium hydroxide mineral with industrial and concrete degradation roles.CalciteA common carbonate mineral and stable polymorph of calcium carbonate.CassiteriteTin oxide mineral, chief tin ore since ancient times.ChalcedonyA microcrystalline silica used in tools, gems, and art since prehistory.
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