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

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Blue Aragonite (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Blue Aragonite

Aragonite (Calcium Carbonate, CaCO3)

Banded Calcite (Mexican Onyx) (Calcite (CaCO3)) — mineral

Banded Calcite (Mexican Onyx)

Calcite (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (varieties include Flint and Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

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

Chert (Flint / Chalcedony)

Silicon Dioxide (SiO2)

Likely weathered quartz-rich rock fragment (Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock) — igneous

Likely weathered quartz-rich rock fragment

Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock

Labradorite-bearing anorthosite (Anorthosite, chiefly plagioclase feldspar (labradorite; approximately (Ca,Na)(Al,Si)₄O₈)) — igneous

Labradorite-bearing anorthosite

Anorthosite, chiefly plagioclase feldspar (labradorite; approximately (Ca,Na)(Al,Si)₄O₈)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone-based Concrete Fragment (Cementitious Composite with Sedimentary Aggregate) — sedimentary (man-made/anthropogenic)

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

sedimentary (man-made/anthropogenic)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Tumbled blue quartzite or blue chalcedony (uncertain) (Quartz-rich rock; predominantly silicon dioxide (SiO₂)) — metamorphic

Tumbled blue quartzite or blue chalcedony (uncertain)

Quartz-rich rock; predominantly silicon dioxide (SiO₂)

Blue Obsidian (Cullet Glass) (Silicon Dioxide (Amorphous Glass)) — mineral

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Quartz Vein in Siltstone (Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix) — metamorphic

Quartz Vein in Siltstone

Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix

Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood (SiO2)) — metamorphic

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2)

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

Quartz with Iron Oxide

Silicon Dioxide (SiO2) with Fe2O3 inclusions

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

Petrified Wood

Silicified Wood (primarily SiO2)

Asphalt Concrete (Bituminous Concrete) — sedimentary (artificial)

Asphalt Concrete

Bituminous Concrete

sedimentary (artificial)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Quartz vein in Host Rock (Crystalline Silicon Dioxide (SiO2) in Lithic Matrix) — metamorphic

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Basalt Pebble (Mafic Igneous Rock (Basalt)) — igneous

Basalt Pebble

Mafic Igneous Rock (Basalt)

Rough Diamond (Diamond (pure carbon, C)) — mineral

Rough Diamond

Diamond (pure carbon, C)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Quartzite pebble (Quartzite) — metamorphic

Quartzite pebble

Quartzite

Tumbled citrine quartz (likely heat-treated amethyst) (Quartz, SiO₂; crystalline variety citrine) — mineral

Tumbled citrine quartz (likely heat-treated amethyst)

Quartz, SiO₂; crystalline variety citrine

Sandstone (Sedimentary Arenite) — sedimentary

Sandstone

Sedimentary Arenite

Gravel and Pavement Aggregates (Unconsolidated rock fragments / detrital sediments) — sedimentary

Gravel and Pavement Aggregates

Unconsolidated rock fragments / detrital sediments

Chrysocolla in Chalcedony (Gem Silica) (Hydrated copper phyllosilicate and silicon dioxide (SiO2 with (Cu,Al)2H2Si2O5(OH)4)) — mineral

Chrysocolla in Chalcedony (Gem Silica)

Hydrated copper phyllosilicate and silicon dioxide (SiO2 with (Cu,Al)2H2Si2O5(OH)4)

Laterite Gravel with Quartz (Ferruginous Laterite (Fe2O3·nH2O)) — sedimentary

Laterite Gravel with Quartz

Ferruginous Laterite (Fe2O3·nH2O)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Basalt (Phaneritic or Diabase) (Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)) — igneous

Basalt (Phaneritic or Diabase)

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Granite (Granite) — igneous

Granite

Granite

River Cobble (Clastic Sedimentary (Quartz-rich Cobble)) — sedimentary

River Cobble

Clastic Sedimentary (Quartz-rich Cobble)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)