Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Unakite
Epidotized Granite
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
River Cobble (likely Serpentinite or Greenstone)
Serpentinite / Greenschist facies rock
metamorphic
River Stone (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) based metamorphosed sandstone
metamorphic or sedimentary
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz (pebble)
Quartz (SiO₂)
Mineral
Lake Superior Agate
Silicon Dioxide (Chalcedony / Quartz)
gemstone
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Galena
Lead Sulfide (PbS)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Magnetite (Charnockite Regional Variation)
Magnetite (Fe3O4)
mineral
Fossilized Bone (Petrified Bone)
Permineralized Bone Fossil
fossil
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Orthoceratid Fossil in Limestone
Orthoceras (extinct genus of Nautiloid Cephalopod)
sedimentary
Garnet Schist
Garnetiferous Mica Schist
metamorphic
Serpentine (Serpentinite)
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe)2O5(OH)4)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Eclogite
Eclogite (composed primarily of Omphacite and Garnet)
metamorphic
Faceted Clear Quartz or Diamond Simulant
Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic
gemstone
Pink Sapphire (Corundum)
Aluminum Oxide (Al2O3) with Chromium/Iron impurities
gemstone
Tumbled blue-green stone, likely chrysocolla-bearing jasper
Chrysocolla-rich chalcedony/jasper; commonly a mixture of chrysocolla (hydrated copper silicate, variable formula) and quartz (SiO₂)
mineral
Quartz geode
Crystalline quartz, silicon dioxide (SiO₂), lining a volcanic geode
mineral
Granite (likely biotite granite or granodiorite)
Coarse-grained plutonic rock composed mainly of quartz, feldspar, and dark mica/amphibole
igneous
Lepidolite
K(Li,Al)3(Al,Si,4)10(O,F,OH)2
mineral
Pink Quartzite
Quartzite (principally Silicon Dioxide, SiO2)
metamorphic
Diamond
C (Carbon)
mineral
Diamond
Carbon (C) - Native Element
mineral
Quartz vein rock with iron-stained matrix
Quartz (SiO₂), likely with limonite/goethite and minor feldspar or mica
mineral
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Serpentinite
Serpentinite (composed primarily of minerals in the serpentine group: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock