Home›Rocks and Minerals›Minerals›Rarity›CommonBrowse ByCommonCommonComments (0)Reader Challenges (0)CommonFilter Results11 entriesStrunz ClassAllOxides and Hydroxides (1)Crystal SystemAllCubic Crystal System (4)Hexagonal Crystal System (1)Monoclinic Crystal System (2)Orthorhombic Crystal System (1)Trigonal Crystal System (2)HardnessAll5.75 to 6.25 Mohs (1)LustreAllMetallic (1)ColourAllGrey or Black (1)Where FoundAllAfghanistan (1)Greece (1)India (1)Pakistan (1)Russia (1)Sri Lanka (1)Zimbabwe (1)UseAllOre or Metal Extraction (1)Formed By (Process)AllBiomineralization (2)Diagenesis (3)Fractional Crystallization (5)Hydrothermal Circulation (3)Hydrothermal Mineral Deposition (3)Magmatism (4)Metamorphism (6)Metasomatism (1)Sedimentation (4)Serpentinization (2)Supergene Processes (1)Show ResultsBrowseCompareSelect all 11ApatiteCommonCalciteCommonCorundumCommonFluoriteCommonGypsumCommonHaliteCommonMagnetiteCommonMicaCommonOlivineCommonPyriteCommonTalcCommonComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.