Rock Identifier

Category

Not A Natural Rock

Browse not a natural rock specimens identified by the Rock Identifier community.

Rough Corundum (likely Sapphire or Common Corundum) (Aluminum oxide (Al2O3)) — mineral

Rough Corundum (likely Sapphire or Common Corundum)

Aluminum oxide (Al2O3)

Titanium Quartz (Rough) (Titanium-included Silicon Dioxide (SiO2 + Ti)) — mineral

Titanium Quartz (Rough)

Titanium-included Silicon Dioxide (SiO2 + Ti)

Green Aventurine (Aventurine Quartz (SiO2 + Fuchsite mica)) — Mineral

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Unakite (Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)) — metamorphic

Unakite

Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)

Andesite Porphyry (Andesite (extrusive volcanic rock)) — igneous

Andesite Porphyry

Andesite (extrusive volcanic rock)

Agate Geode Slice (with Druzy Quartz) (Silicon Dioxide (SiO2)) — mineral

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Sandstone or Siltstone (Arenite (if sandstone)) — Sedimentary

Sandstone or Siltstone

Arenite (if sandstone)

Druzy Quartz on Limestone (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz on Limestone

Silicon Dioxide (SiO2)

Granite (Specimen: Logan Rock) (Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)) — igneous

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Chert (Quartzite-rich River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Quartzite-rich River Pebble)

Silicon Dioxide (SiO2)

Common Opal in Host Rock (Hydrated Silica (SiO2·nH2O)) — mineraloid

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Scoria (Extrusive Basaltic Scoria) — igneous

Scoria

Extrusive Basaltic Scoria

Greenschist (Greenschist (chlorite-epidote schist)) — metamorphic

Greenschist

Greenschist (chlorite-epidote schist)

River Rock (Basalt) (Aphanitic Basaltic Rock) — igneous

River Rock (Basalt)

Aphanitic Basaltic Rock

Unakite (Epidote-Feldspar rock) — Metamorphic Rock

Unakite

Epidote-Feldspar rock

Metamorphic Rock

Bumblebee Jasper (Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)) — igneous

Bumblebee Jasper

Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)

Quartz Geode (Silicon Dioxide (SiO2) in Geode form) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

Sandstone with Concretions / Liesegang Rings (Arenite with iron oxide banding) — sedimentary

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Granite (Granite) — Igneous

Granite

Granite

Tiger's Eye (Mineral Collection) (Tiger's Eye (SiO2 with crocidolite inclusions)) — mineral

Tiger's Eye (Mineral Collection)

Tiger's Eye (SiO2 with crocidolite inclusions)

Hematite Beads (Hematite (Fe2O3)) — Mineral

Hematite Beads

Hematite (Fe2O3)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Clear Quartz Crystal (Herkimer Diamond style) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal (Herkimer Diamond style)

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose Sandstone) (Arenite (SiO2 based)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 based)

Amber (Succinite (fossilized resin); C10H16O) — mineraloid

Amber

Succinite (fossilized resin); C10H16O

Limonite and Goethite encrusted Quartz (Iron-stained Gossan) (FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)) — mineral

Limonite and Goethite encrusted Quartz (Iron-stained Gossan)

FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)

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

Pumice (likely)

Pumice (extrusive igneous rock)

Foliated Metamorphic Rock (likely Gneiss or Schist) (Gneissic Metamorphic Rock) — metamorphic

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Serpentinite (Serpentinite (a rock composed predominantly of serpentine group minerals)) — metamorphic

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Chert (Yellow Jasper/Quartzite Pebble) (Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper/Quartzite Pebble)

Microcrystalline Silicon Dioxide (SiO2)

Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Cobble

Quartzite (primarily SiO2)

River Rocks (Basalt and Sedimentary Stones) (Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock) — igneous and sedimentary

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock

igneous and sedimentary

Ruby in Fuchsite (Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)) — Mineral

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Amethyst (in jewelry) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (in jewelry)

Silicon Dioxide (SiO2) with iron impurities

Pearl (Calcium Carbonate (primarily Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (primarily Aragonite and Calcite), CaCO3

Amethyst (Amethyst (Silicon Dioxide - SiO2 with impurities of Fe3+)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of Fe3+)

Turquoise and Red Coral (CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)) — mineral

Turquoise and Red Coral

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)

Turquoise (CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Turquoise (Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Quartzite (Water-worn Cobble) (Quartzite (Composition: 90%+ SiO2)) — metamorphic

Quartzite (Water-worn Cobble)

Quartzite (Composition: 90%+ SiO2)