Rock Identifier

Category

Synthetic Polymer (Synthetic Material)

Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.

Learn about Synthetic Polymer (Synthetic Material) in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Opalite

Lead Feldspar

Peat

Zircon

Dunite

Limonite

Shell Opal

Madagascar Opal

Lavender Obsidian

Electric Blue Obsidian

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Blue-gray metamorphic rock, likely gneiss or schist (Quartz–feldspar–mica assemblage; exact identification requires testing) — metamorphic

Blue-gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica assemblage; exact identification requires testing

Fossilized bivalve shell in limestone (Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock) — fossil

Fossilized bivalve shell in limestone

Calcitic fossil shell; likely an oyster or other rudist/bivalve (Bivalvia), preserved in carbonate rock

Polished red jasper (likely hematite-bearing jasper) (Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides such as hematite/goethite) — mineral

Polished red jasper (likely hematite-bearing jasper)

Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides such as hematite/goethite

Iron-rich flint or chert fragment (Microcrystalline quartz (SiO₂), likely ferruginous chert) — sedimentary

Iron-rich flint or chert fragment

Microcrystalline quartz (SiO₂), likely ferruginous chert

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

Chert (Flint)

Silicon Dioxide (SiO2)

Pink Granite (Granite (Felsic Plutonic Rock)) — igneous

Pink Granite

Granite (Felsic Plutonic Rock)

Tumbled serpentine (likely) (Serpentine-group minerals, commonly lizardite or antigorite; approximate composition Mg₃Si₂O₅(OH)₄) — mineral

Tumbled serpentine (likely)

Serpentine-group minerals, commonly lizardite or antigorite; approximate composition Mg₃Si₂O₅(OH)₄

Milky quartz with iron-oxide staining (Quartz, silicon dioxide (SiO₂), likely massive or coarsely crystalline; brown areas are limonite/goethite staining) — mineral

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely massive or coarsely crystalline; brown areas are limonite/goethite staining

Chalcedony (Chert/Flint variety) (Silicon Dioxide (SiO2)) — sedimentary

Chalcedony (Chert/Flint variety)

Silicon Dioxide (SiO2)

Black jade or dark serpentine cabochon (Jadeite (NaAlSi₂O₆) or nephrite amphibole; possibly serpentine (Mg₃Si₂O₅(OH)₄)) — gemstone

Black jade or dark serpentine cabochon

Jadeite (NaAlSi₂O₆) or nephrite amphibole; possibly serpentine (Mg₃Si₂O₅(OH)₄)

Pink quartz (likely rose quartz) (Quartz, silicon dioxide (SiO₂), commonly rose quartz colored by trace impurities and microscopic inclusions) — mineral

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), commonly rose quartz colored by trace impurities and microscopic inclusions

Brecciated jasper or brecciated chert (Silica-rich breccia, chiefly microcrystalline quartz (SiO₂), with iron-oxide staining) — sedimentary

Brecciated jasper or brecciated chert

Silica-rich breccia, chiefly microcrystalline quartz (SiO₂), with iron-oxide staining

Concrete fragment or Conglomerate (Artificial Conglomerate (Concrete) or Natural Conglomerate) — sedimentary

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Flint / Chert (or fossiliferous nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Flint / Chert (or fossiliferous nodule)

Microcrystalline quartz (SiO2)

Chert (Arrowhead/Projectile Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead/Projectile Point)

Microcrystalline Quartz (SiO2)

Dragon Vein Agate (Silicon dioxide / Chalcedony (with heat/dye treatment) SiO2) — gemstone

Dragon Vein Agate

Silicon dioxide / Chalcedony (with heat/dye treatment) SiO2

Chert (Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert

Chert (Microcrystalline Silica, SiO2)

Chert (Chert (SiO₂)) — sedimentary

Chert

Chert (SiO₂)

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

Chert (Field Stone)

Microcrystalline Quartz (SiO2)

Red Sandstone (Arenite (SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (SiO2 with Fe2O3)

Chert (Iron-Stained) (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities) — sedimentary

Chert (Iron-Stained)

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities

Banded Chert (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Banded Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Limestone Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Limestone Nodule)

Silicon Dioxide (SiO2)

Limestone with Calcite Crust (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Crust

Sedimentary Calcium Carbonate (CaCO3)

Chert (River Pebble) (Chert (Cryptocrystalline Quartz, SiO₂)) — sedimentary

Chert (River Pebble)

Chert (Cryptocrystalline Quartz, SiO₂)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (Jasper/Common Opal mix) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Common Opal mix)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variation) (Chert (SiO2)) — sedimentary

Chert (Jasper/Flint variation)

Chert (SiO2)

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony) (Epidote with Black Hornblende and White Quartz mixture) — metamorphic

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Chert (River Pebble) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Cryptocrystalline Quartz (SiO2)

Chert (often called Flint in archaeological contexts) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint in archaeological contexts)

Silicon Dioxide (SiO2)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Limestone (Calcium carbonate (CaCO3)) — sedimentary

Limestone

Calcium carbonate (CaCO3)

Chert (Honey Chert / Flint) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Honey Chert / Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz