Rock Identifier

Category

Mineraloid (Man Made Origin)

Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.

Learn about Mineraloid (Man Made Origin) in the encyclopedia

Opalite

Opalite

Shungite

Shungite

Oregon Opal

Oregon Opal

Map Jasper

Map Jasper

Oregon Sunstone

Oregon Sunstone

Goldstone

Goldstone

Blue Goldstone

Blue Goldstone

Mandarin Garnet

Mandarin Garnet

Andalusite

Andalusite

Zincite

Zincite

Quartzite Sandstone

Quartzite Sandstone

Marl

Marl

Limonite after Marcasite (Propeller Conchoid) (Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)) — mineral

Limonite after Marcasite (Propeller Conchoid)

Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)

Ocean Jasper (Orbicular Jasper (Silicon Dioxide - SiO2)) — sedimentary

Ocean Jasper

Orbicular Jasper (Silicon Dioxide - SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Slate (Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)) — metamorphic

Slate

Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)

Serpentine (Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)) — Metamorphic rock

Serpentine

Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)

Metamorphic rock

Quartzite (Quartzite (Mostly SiO2)) — metamorphic

Quartzite

Quartzite (Mostly SiO2)

Quartzite Pebble (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily Silicon Dioxide, SiO2)

Cubic Zirconia (Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Vesicular Basalt (Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Vesicular Basalt

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Marble (Metamorphosed Limestone (CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (CaCO3)

Quartzite with inclusions or weathered surface (Quartzite) — metamorphic

Quartzite with inclusions or weathered surface

Quartzite

Quartz (pebble) (Quartz (SiO₂)) — Mineral

Quartz (pebble)

Quartz (SiO₂)

Dyed Agate (Silicon Dioxide (SiO2) with artificial colorants) — mineral

Dyed Agate

Silicon Dioxide (SiO2) with artificial colorants

Granite Pebble (Granite) — igneous

Granite Pebble

Granite

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Tiger's Eye (Raw) (Silicon Dioxide (SiO2) with fibrous crocidolite inclusions) — metamorphic

Tiger's Eye (Raw)

Silicon Dioxide (SiO2) with fibrous crocidolite inclusions

River Cobble (likely Basalt or Rhyolite) (Extrusive Igneous Rock (Mafic or Intermediate)) — igneous

River Cobble (likely Basalt or Rhyolite)

Extrusive Igneous Rock (Mafic or Intermediate)

Sandstone (Arenite (primarily SiO2 with trace Fe2O3)) — sedimentary

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

Sandstone (Ferruginous) (Arenite (Fe2O3 stained)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 stained)

Granite Cobble (Plutonic Granite) — igneous

Granite Cobble

Plutonic Granite

Graphite Schist (C (Carbonaceous Schist)) — metamorphic

Graphite Schist

C (Carbonaceous Schist)

Quartzite (SiO2 (Metamorphosed Sandstone)) — metamorphic

Quartzite

SiO2 (Metamorphosed Sandstone)

Limestone (Grey and White specimens) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Grey and White specimens)

Calcium Carbonate (CaCO3)

Diorite Gneiss (Foliated Diorite Gneiss) — metamorphic

Diorite Gneiss

Foliated Diorite Gneiss

Blue Tiger's Eye (Hawks Eye) (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Blue Tiger's Eye (Hawks Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

River Pebbles (Stream-rounded rocks) (Fluvial Detritus (varied mineralogy)) — Mixed (predominantly sedimentary and igneous)

River Pebbles (Stream-rounded rocks)

Fluvial Detritus (varied mineralogy)

Mixed (predominantly sedimentary and igneous)

Granodiorite (Granodiorite (phaneritic intrusive igneous rock)) — igneous

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite (Phaneritic Plutonic Felsic Rock (SiO2 > 69%)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (SiO2 > 69%)

Petrified Wood (Silicified Wood (primarily SiO2)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (SiO2 (Metamorphosed Sandstone)) — metamorphic

Quartzite

SiO2 (Metamorphosed Sandstone)

Sandstone (likely Arkosic) (Clastic Sedimentary Rock) — sedimentary

Sandstone (likely Arkosic)

Clastic Sedimentary Rock