Amethyst (Geode/Druzy)
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Mineral
Browse mineral specimens identified by the Rock Identifier community.
Learn about Mineral in the encyclopedia
View all →
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Rose Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Ruby in Zoisite
Anyolite (Zoisite with Corundum) Member of the Epidote Group
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Jasper (specifically Yellow/Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Desert Rose
Gypsum (CaSO4·2H2O) or Barite (BaSO4) inclusions in sand
mineral
Amethyst (Cabochon)
Silicon Dioxide (SiO2) with iron impurities
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2)
mineral
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Jasper (likely Polychrome or Ocean Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Amazonite
Amazonite (K(AlSi3O8))
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Flower Agate (Cherry Blossom Agate)
Chalcedony (SiO2) with Opaque Inclusions
mineral
Red Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)
metamorphic
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Chalcedony
Chalcedony (SiO2)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz (Red Aventurine)
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Drill Core (Basalt or Andesite)
Volcanic porphyry (mafic to intermediate)
igneous
White Opal (Common)
Hydrated Silica (SiO2·nH2O)
mineral
Golden Healer Quartz
Silicon Dioxide (SiO2) with limonite/hematite inclusions
mineral
Quartz Vein in Host Rock (likely Sandstone or Mudstone)
Silicon Dioxide (SiO2) within Sedimentary Matrix
sedimentary
Amazonite
Amazonite (KAlSi3O8)
mineral
Rainbow Moonstone with Black Tourmaline
White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))
metamorphic
Tourmalinated Quartz
Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Ethiopian Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Chlorastrolite (Isle Royale Greenstone)
Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O
mineral
Bornite
Copper Iron Sulfide (Cu5FeS4)
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Otodus Shark Tooth
Otodus obliquus
fossil
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
metamorphic