Rock Identifier

Category

Not A Natural Rock

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

Learn about Not A Natural Rock in the encyclopedia

Asphalt Rock

Rock Gypsum

Coral Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Chalk

Obsidian

Baddeleyite

Cataclasite

Anorthosite

Kimberlite

River Pebble (Quartz-rich) (Silicon Dioxide (SiO2) with impurities) — sedimentary

River Pebble (Quartz-rich)

Silicon Dioxide (SiO2) with impurities

Sandstone (likely Arkosic or Quartzose) (Arenite (SiO2 based with mineral inclusions)) — sedimentary

Sandstone (likely Arkosic or Quartzose)

Arenite (SiO2 based with mineral inclusions)

Iron-stained weathered stone (tentative) (Undetermined; possibly weathered iron-rich basalt or concretion) — mineral

Iron-stained weathered stone (tentative)

Undetermined; possibly weathered iron-rich basalt or concretion

Jasper and Chalcedony Nodule (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper and Chalcedony Nodule

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Holey Stone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Holey Stone)

Microcrystalline Quartz (SiO2)

Dyed Agate Slice (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Dyed Agate Slice

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert Conglomerate (or Breccia) (Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)) — sedimentary

Chert Conglomerate (or Breccia)

Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)

Pumice (Pumice (a vesicular volcanic glass)) — igneous

Pumice

Pumice (a vesicular volcanic glass)

Sandstone (Ferruginous) (Clastic Sedimentary Rock (SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3)

Hag Stone (Perforated Flint or Chert) — sedimentary

Hag Stone

Perforated Flint or Chert

Weathered Sandstone (Quartz Arenite / Clastic Sedimentary Rock) — sedimentary

Weathered Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Sandstone (with potential Quartzite characteristics) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential Quartzite characteristics)

Clastic sedimentary rock (primarily SiO2)

Fossiliferous Limestone (Fossiliferous Carbonate Rock (CaCO3)) — sedimentary

Fossiliferous Limestone

Fossiliferous Carbonate Rock (CaCO3)

Sandstone (likely Graywacke or Siltstone variety) (Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)) — sedimentary

Sandstone (likely Graywacke or Siltstone variety)

Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)

Sandstone (Quartz Arenite) (Sandstone (SiO2 with possible mineral cements)) — sedimentary

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Green Aventurine (Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Granite (Background) and Quartzite/River Pebble (Foreground Heart) (Phaneritic Felsic Igneous Rock (Granite background)) — igneous

Granite (Background) and Quartzite/River Pebble (Foreground Heart)

Phaneritic Felsic Igneous Rock (Granite background)

Unakite / Red Jasper beach pebble (Altered Granite (Epidotized Feldspar and Quartz)) — metamorphic

Unakite / Red Jasper beach pebble

Altered Granite (Epidotized Feldspar and Quartz)

Dyed Blue Agate Slice (Silicon Dioxide (SiO2)) — mineral

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

River Cobble (Sandstone / Greywacke) (Sedimentary Rock (predominantly Quartz, Feldspar, Lithic fragments)) — sedimentary

River Cobble (Sandstone / Greywacke)

Sedimentary Rock (predominantly Quartz, Feldspar, Lithic fragments)

Blue Sapphire (Corundum (Al2O3) with traces of Iron and Titanium) — mineral

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Crescent Pebble (Weathered Quartzite or Sandstone Fragment) — sedimentary

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

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]

Diamond (as set in a metal alloy ring) (Diamond (Pure Carbon, C)) — mineral

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Dyed Agate (Silicon Dioxide (SiO2)) — mineral

Dyed Agate

Silicon Dioxide (SiO2)

Rounded sandstone pebble (Quartz-rich sandstone (likely arkosic or lithic sandstone)) — sedimentary

Rounded sandstone pebble

Quartz-rich sandstone (likely arkosic or lithic sandstone)

Amethyst (Agate/Chalcedony variety) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Quartz Pebble (River Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (River Agate / Chalcedony)

Silicon Dioxide (SiO2)

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (likely Ferruginous) (Arenite (SiO2 based with Fe2O3/FeO(OH) cement)) — sedimentary

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate) (Mixed Silicates and Oxides (predominantly SiO2 group minerals)) — mineral

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Shale with Trace Fossils (Fissile mudrock (Shale)) — sedimentary

Shale with Trace Fossils

Fissile mudrock (Shale)

Sandstone (Quartzose Sandstone) (Sandstone (SiO2 with various trace minerals)) — sedimentary

Sandstone (Quartzose Sandstone)

Sandstone (SiO2 with various trace minerals)

Pink Dyed Agate (Silicon Dioxide (SiO2) with artificial pigment) — sedimentary

Pink Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Herkimer Diamond (Quartz (Silicon Dioxide) - SiO2) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Granite (Phaneritic intrusive felsic igneous rock) — igneous

Granite

Phaneritic intrusive felsic igneous rock

Granite (Granite (Phaneritic Quartz-Feldspar rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar rock)

Likely tumbled quartz-rich pebble (Quartz (SiO₂), possibly a weathered quartzite or chalcedony pebble) — mineral

Likely tumbled quartz-rich pebble

Quartz (SiO₂), possibly a weathered quartzite or chalcedony pebble

Sandstone (Clastic sedimentary rock (primarily Quartz and Feldspar)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar)