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.

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

Bauxite

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

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

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

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Agate Geode with Quartz Druzy (Chalcedony (SiO2) and Quartz (SiO2)) — mineral

Agate Geode with Quartz Druzy

Chalcedony (SiO2) and Quartz (SiO2)

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

Milky Quartz (Tumbled Pebble)

Silicon Dioxide (SiO2)

Orange Calcite (Carved as a Horned Skull) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Carved as a Horned Skull)

Calcium Carbonate (CaCO3)

Coquina (Biogenic Limestone (Calcite/Aragonite base, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite/Aragonite base, CaCO3)

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

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Amphibolite (Amphibolite) — metamorphic

Amphibolite

Amphibolite

Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite) — Mineral (variety of Chalcedony)

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite

Mineral (variety of Chalcedony)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Amethyst Quartz Druse (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst Quartz Druse

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (SiO2 + Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Kimberlite (Kimberlite (Group I or II)) — igneous

Kimberlite

Kimberlite (Group I or II)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Pumice (likely) (Pumice (extrusive igneous rock)) — Igneous

Pumice (likely)

Pumice (extrusive igneous rock)

Blue Chalcedony and Picture Jasper Beads (Blue Chalcedony (SiO2), Picture Jasper (SiO2)) — Mineral

Blue Chalcedony and Picture Jasper Beads

Blue Chalcedony (SiO2), Picture Jasper (SiO2)

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Quartz Geode (Silicon Dioxide (SiO2) in a concretionary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

Synthetic Wolf Plush (Non-mineral) (Canis lupus similis (Prop material: Polyester & Synthetic fibers)) — Synthetic material/Textile

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Synthetic material/Textile

Tiger's Eye (Brown/Dark variety) (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)) — metamorphic

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Mica Schist (Mica Schist (primarily Muscovite or Biotite sheet silicates)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Amber (Succinite) — Organic Mineraloid

Amber

Succinite

Organic Mineraloid

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Moonstone (Orthoclase Feldspar (KAlSi3O8)) — mineral

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Quartzite Cobble (Metamorphosed Quartz Sandstone (primarily SiO2)) — metamorphic

Quartzite Cobble

Metamorphosed Quartz Sandstone (primarily SiO2)

Amber (Rough) (Amber (Fossilized Tree Resin, succinite)) — mineral

Amber (Rough)

Amber (Fossilized Tree Resin, succinite)

Moss Agate (Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)) — mineral

Moss Agate

Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)

Quartz (Smoky or Impure Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky or Impure Variety)

Silicon Dioxide (SiO2)

Amethyst (Amethyst (Silicon Dioxide - SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Green Apophyllite and Stilbite on Quartz Cluster (Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)) — Mineral

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Sandstone (likely River-tumbled Picture Sandstone) (Arenite (predominantly SiO2 with iron oxide impurities)) — sedimentary

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Banded Chert (River Cobble) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Cobble)

Microcrystalline Quartz (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)