Rock Identifier

Category

Mineral, Possibly Rock Fragment Containing A Mineral

Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.

Quartz Geode (Silicon Dioxide (SiO2)) — Mineral / Sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Mineral / Sedimentary
Coquina / Fossiliferous Limestone (Calcareous bioclastic sedimentary rock (CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Calcareous bioclastic sedimentary rock (CaCO3)

sedimentary
Bauxite (AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)) — sedimentary

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

sedimentary
Rough Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Rough Precious Opal

Hydrated Silica (SiO2·nH2O)

mineral
Ferruginous Quartzite (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)) — metamorphic

Ferruginous Quartzite (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

metamorphic
Bauxite (Laterite Clay) (Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))) — sedimentary

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Kidney Stone (Calcium Oxalate (CaC2O4), Uric Acid, or Struvite) — mineral

Kidney Stone

Calcium Oxalate (CaC2O4), Uric Acid, or Struvite

mineral
Quartz (Quartz (Silicon Dioxide - SiO2)) — Mineral

Quartz

Quartz (Silicon Dioxide - SiO2)

Mineral
Chrysoprase (Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities) — mineral

Chrysoprase

Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities

mineral
Basalt (Amygdaloidal) (Amygdaloidal Basalt) — igneous

Basalt (Amygdaloidal)

Amygdaloidal Basalt

igneous
Petrified Wood (Silicified Wood) (Silicified fossil wood (SiO2)) — metamorphic

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

metamorphic
The user-provided image does not contain a rock or mineral specimen — N/A

The user-provided image does not contain a rock or mineral specimen

N/A
Quartz Vein in Host Rock (Silicon Dioxide (SiO2) within metamorphic/igneous matrix) — igneous/metamorphic

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

igneous/metamorphic
Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral
Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

mineral
Iron Gossan (Limonite/Goethite) (Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones) — sedimentary

Iron Gossan (Limonite/Goethite)

Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones

sedimentary
Coquina (Coquina (Bioclastic Limestone)) — sedimentary

Coquina

Coquina (Bioclastic Limestone)

sedimentary
Olivine (Peridotite) (Olivine Group; (Mg, Fe)2SiO4) — igneous

Olivine (Peridotite)

Olivine Group; (Mg, Fe)2SiO4

igneous
Glauconite (Glauconitic Sandstone) (Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]) — sedimentary

Glauconite (Glauconitic Sandstone)

Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]

sedimentary
Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper) (Chalcedony (SiO₂)) — Mineral (or mineraloid if microcrystalline)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Mineral (or mineraloid if microcrystalline)
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

sedimentary
Basalt with Iron Oxidation (Lattice/Veined) (Mafic Volcanic Rock (principally Plagioclase and Pyroxene)) — igneous

Basalt with Iron Oxidation (Lattice/Veined)

Mafic Volcanic Rock (principally Plagioclase and Pyroxene)

igneous
Biotite Mica (Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)) — mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

mineral
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

mineral
Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz on Matrix

Silicon Dioxide (SiO2)

mineral
Quartz (Variety of Rough Mineral Specimens) (Silicon Dioxide (SiO2)) — mineral

Quartz (Variety of Rough Mineral Specimens)

Silicon Dioxide (SiO2)

mineral
Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous
Granite Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

metamorphic
Gneiss (Gneiss (high-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (high-grade metamorphic rock)

metamorphic
Vesicular Basalt (Extrusive mafic igneous rock) — igneous

Vesicular Basalt

Extrusive mafic igneous rock

igneous
Geode (Chert or Quartz Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

sedimentary
Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles

Silicon Dioxide (SiO2)

mineral
White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

mineral
Quartz Vein in Pelite (Metamorphic Rock) (Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)) — metamorphic

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

metamorphic
Moss Agate (Chalcedony (Silicon Dioxide - SiO2) with inclusions) — Mineral

Moss Agate

Chalcedony (Silicon Dioxide - SiO2) with inclusions

Mineral
Pyrite with Limonite/Goethite Alteration (Pseudomorph) (Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)) — mineral

Pyrite with Limonite/Goethite Alteration (Pseudomorph)

Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)

mineral
Bauxite (Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))) — sedimentary

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

sedimentary
Bauxite (Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)) — sedimentary

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

sedimentary