Pyrite
Iron Sulfide (FeS2)
mineral
Category
Mineral Specimen
Browse mineral specimen specimens identified by the Rock Identifier community.
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Pyrite-bearing Rock
Iron Sulfide (FeS2) associated with host rock
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
mineral
Fuchsite
Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Quartz with Schorl (Black Tourmaline)
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Fuchsite with Ruby
Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Vesicular Basalt with Siltstone
Mafic Volcanic Rock (Basaltic Composition)
igneous
Gold-bearing Quartz
Lode Gold in Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with traces of Iron (Fe3+)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Sphalerite
Zinc Sulfide (ZnS)
mineral
Eudialyte with Syenite
Eudialyte: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Milky Quartz (with Iron Staining)
Silicon Dioxide (SiO2)
mineral
Scoria with Calcite Infills
Vesicular Basalt with secondary Calcification (CaCO3)
igneous
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
mineral
Limonite Geode / Ironstone Concretion
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Small quartz-rich rock fragment (tentative)
Quartz, silicon dioxide (SiO₂), possibly in a feldspar-bearing granite fragment
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Jasper and Quartz Breccia
Silicified Breccia (SiO2)
sedimentary
Iron-stained quartz-rich rock, possibly goethite-bearing quartz
Quartz (SiO₂) with iron oxides/hydroxides, likely goethite or limonite
mineral
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18) with trace Iron (Fe2+)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a sedimentary host
sedimentary
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veins in metamorphic/igneous host rock
igneous
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral