Rock Identifier

Category

Synthetic (Not A Rock Or Mineral)

Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.

Learn about Synthetic (Not A Rock Or Mineral) in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Halite

Dolomite

Gypsum

Coal

Claystone

Serpentinite

Carbonatite

Skarn

Schist

Emerald in Matrix

Emerald in Matrix

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Brown Sandstone (Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)) — sedimentary

Brown Sandstone

Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)

Weathered basaltic rock (probable basalt) (Basalt; fine-grained mafic silicate rock, commonly plagioclase + pyroxene ± olivine) — igneous

Weathered basaltic rock (probable basalt)

Basalt; fine-grained mafic silicate rock, commonly plagioclase + pyroxene ± olivine

Blue Apatite (Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]) — mineral

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Granite (Granite (compositional mixture of Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (compositional mixture of Quartz, Feldspar, and Mica)

Granite Pebble (Granite (Plutonic Igneous Rock)) — igneous

Granite Pebble

Granite (Plutonic Igneous Rock)

Sandstone Pebble (Sedimentary Rock (Quartzose Sandstone)) — sedimentary

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Basalt with Vesicles (Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)) — igneous

Basalt with Vesicles

Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Granite Pebble (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Lapis Lazuli (Low-grade) (Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Bauxite (Bauxite (Al2O3·2H2O)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O)

Sandstone (Ferruginous) (Arenite with Iron Oxide matrix) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide matrix

Glaucophane / Blue Schist (Glaucophane (Na2(Mg3Al2)Si8O22(OH)2)) — metamorphic

Glaucophane / Blue Schist

Glaucophane (Na2(Mg3Al2)Si8O22(OH)2)

Serpentine (Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Concrete (Anthropogenic Conglomerate) — sedimentary

Concrete

Anthropogenic Conglomerate

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

Quartz (Milky Quartz vein fragment)

Silicon Dioxide (SiO2)

Quartz Crystal (specifically a Double-Terminated variety) (Silicon Dioxide (SiO2) - Low Quartz) — mineral

Quartz Crystal (specifically a Double-Terminated variety)

Silicon Dioxide (SiO2) - Low Quartz

Granite (likely weathered granite or granitic gneiss) (Granite; chiefly quartz (SiO₂), feldspar, and mica) — igneous

Granite (likely weathered granite or granitic gneiss)

Granite; chiefly quartz (SiO₂), feldspar, and mica

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Sandstone (Arenite (Siliclastic sedimentary rock)) — sedimentary

Sandstone

Arenite (Siliclastic sedimentary rock)

Sandstone (Arenite (Sedimentary rock composed of sand-sized grains)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone or Limestone (Arenite or Calcareous Sedimentary Rock) — Sedimentary

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Quartz Geode (Silicon Dioxide (SiO2) in Geode formation) — mineral

Quartz Geode

Silicon Dioxide (SiO2) in Geode formation

Biotite Schist (likely) (Biotite Schist (rock), Biotite (mineral)) — Metamorphic

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Granitic Pegmatite (Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)) — Igneous

Granitic Pegmatite

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)

Likely gneiss (Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole) — metamorphic

Likely gneiss

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

Banded Pebble (Metamorphic Slate or Gneiss with Quartz Veining) (Metamorphic Rock with Quartz/Calcite Veins) — metamorphic

Banded Pebble (Metamorphic Slate or Gneiss with Quartz Veining)

Metamorphic Rock with Quartz/Calcite Veins

Amygdaloidal Basalt with Zeolite/Quartz Infill (Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)) — igneous

Amygdaloidal Basalt with Zeolite/Quartz Infill

Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)

Fossil bivalve shell (Fossilized or partially mineralized bivalve; exact genus cannot be determined from the image) — fossil

Fossil bivalve shell

Fossilized or partially mineralized bivalve; exact genus cannot be determined from the image

Granite Cobble / Gneiss (River Rock) (Granitic Gneiss / Felsic Igneous Rock) — igneous

Granite Cobble / Gneiss (River Rock)

Granitic Gneiss / Felsic Igneous Rock

Shale (Sedimentary pelitic rock) — sedimentary

Shale

Sedimentary pelitic rock

Sandstone with Manganese Oxide Patina (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone with Manganese Oxide Patina

Clastic Sedimentary Rock (primarily SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite River Rock (Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite River Rock

Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Jasper with Purple Fluorite or Chalcedony (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Jasper with Purple Fluorite or Chalcedony

Silicon Dioxide (SiO2) with mineral inclusions

Chert (Brecciated Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brecciated Chert)

Silicon Dioxide (SiO2)