Pyrite
Iron Sulfide (FeS2)
mineral
Category
Mineral (Primary Constituent)
Browse mineral (primary constituent) specimens identified by the Rock Identifier community.
Prehnite
Prehnite, Ca2Al(AlSi3O10)(OH)2
mineral
Hypersthene
Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Bumble Bee Jasper
Calcite-bearing Volcanic Tuff (not a true Jasper)
sedimentary
Ferruginous Quartz
Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Vanadinite
Lead Chlorovanadate, Pb5(VO4)3Cl
mineral
Nuummite
Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Chalcedony (Botryoidal/Agate nodule)
Microcrystalline Quartz (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Moqui Marble (Moqui Ball)
Ironstone Concretion (Goethite/Hematite cemented Sandstone)
sedimentary
Amazonite
Potassium feldspar (Microcline) - K(AlSi3O8)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian Chalcedony (SiO2 with Iron Oxide impurities)
mineral
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Smoky Quartz in Matrix (Pegmatite)
Silicon Dioxide (SiO2) with Potassium Feldspar and Biotite mica
igneous
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
metamorphic
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Jasper
Chalcedony (cryptocrystalline quartz), SiO2
Sedimentary
River Jasper (Green Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Granite
Granite (phaneritic felsic intrusive rock)
igneous
Iron-Oxide Concretion (Moqui Marble)
Goethite/Hematite Concretion (Fe2O3 / FeO(OH))
sedimentary
Bloodstone / Heliotrope
Cryptocrystalline Quartz (SiO2 with inclusions)
sedimentary
Labradorite
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
mineral
Red Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe) impurities
mineral
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Schist
Mica Schist
metamorphic