Minerals & Crystals 25-36
12 entries in the Minerals & Crystals compendium.
ChalcopyriteMost abundant copper ore mineral, used since the Bronze Age.ChertHard sedimentary rock composed of microcrystalline quartz, often of biological origin.Chlorite groupGreen phyllosilicate minerals common in low-grade metamorphic rocks.ChromitePrimary ore of chromium, essential for stainless steel production.ChrysoberylA hard gemstone with color-change and chatoyant varieties.CobaltiteRare cobalt arsenide sulfide, key source of strategic cobalt.ColtanDull black ore essential for electronics, tied to conflict in Congo.CorundumA hard, crystalline mineral forming rubies and sapphires.CrocoiteA bright red lead chromate mineral and Tasmanian state emblem.CryoliteRare mineral used in aluminium smelting and pest control.CummingtoniteA metamorphic amphibole intermediate in the cummingtonite-grunerite series.CupriteA minor copper ore known for its deep red color.
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