Rock Identifier

Category

Not A Rock (Man Made Polymer)

Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.

Learn about Not A Rock (Man Made Polymer) in the encyclopedia

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Opalite

Map Jasper

Goldstone

Anorthosite

Gondite

Dunite

Pink Granite (Granite (enriched in Potassium Feldspar / Orthoclase)) — igneous

Pink Granite

Granite (enriched in Potassium Feldspar / Orthoclase)

Petrified Wood (Silicified Wood (Silicon Dioxide - SiO2)) — fossil

Petrified Wood

Silicified Wood (Silicon Dioxide - SiO2)

Quartzite with Quartz Veins (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite with Quartz Veins

Metamorphic Quartzite (SiO2)

Quartz Pebble (with Feldspar/Mica) (Granitic Quartz / SiO2 with KAlSi3O8) — igneous

Quartz Pebble (with Feldspar/Mica)

Granitic Quartz / SiO2 with KAlSi3O8

Sandstone / Chert Gravel (SiO2 (Silicon Dioxide based clastic sedimentary rock)) — sedimentary

Sandstone / Chert Gravel

SiO2 (Silicon Dioxide based clastic sedimentary rock)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Vesicular Basalt (Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (Scoria)

Vesicular Basalt

Chalcedony (Quartz) (Silicon dioxide (SiO2)) — mineral

Chalcedony (Quartz)

Silicon dioxide (SiO2)

Yellow Chalcedony (likely Carnelian or Agate) (Silicon dioxide (SiO2)) — mineral

Yellow Chalcedony (likely Carnelian or Agate)

Silicon dioxide (SiO2)

Quartz and Iron Oxide (Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions) — mineral

Quartz and Iron Oxide

Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions

Quartz (Bull Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Bull Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Carnelian / Chalcedony) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Travertine / Tufa (Calcium Carbonate (CaCO3)) — sedimentary

Travertine / Tufa

Calcium Carbonate (CaCO3)

Yellow Quartz / Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Chalcedony

Silicon Dioxide (SiO2)

Granite River Cobble (Granitoid (comprising Quartz, Feldspar, and Mica)) — igneous

Granite River Cobble

Granitoid (comprising Quartz, Feldspar, and Mica)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Beach Pebble (likely Basalt or Chert) (Volcanic Basalt / Microcrystalline Quartz) — igneous

Beach Pebble (likely Basalt or Chert)

Volcanic Basalt / Microcrystalline Quartz

Quartzite Pebble (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Sandstone (Red)

Arenite (composed primarily of SiO2)

Jasper (Yellow Jasper) (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Snowflake Obsidian (Obsidian with Cristobalite inclusions) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions

River Rock (Greywacke/Siltstone) (Siltstone / Argillaceous Greywacke) — sedimentary

River Rock (Greywacke/Siltstone)

Siltstone / Argillaceous Greywacke

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

River Stone (Greywacke) (Greywacke (Lithic Sandstone)) — sedimentary

River Stone (Greywacke)

Greywacke (Lithic Sandstone)

Sandstone (Quartzite texture) (Arenite (SiO2 secondary)) — sedimentary

Sandstone (Quartzite texture)

Arenite (SiO2 secondary)

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Jasper (Iron-rich) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities) — sedimentary

Jasper (Iron-rich)

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

Siltstone Pebble (Siltstone (fine-grained siliciclastic sedimentary rock)) — sedimentary

Siltstone Pebble

Siltstone (fine-grained siliciclastic sedimentary rock)

Quartzite pebble (Quartzite (composed primarily of Quartz, SiO2)) — metamorphic

Quartzite pebble

Quartzite (composed primarily of Quartz, SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Weathered iron-rich basalt or volcanic breccia (Mafic volcanic rock, likely basalt; composition dominated by plagioclase and pyroxene with iron oxides) — igneous

Weathered iron-rich basalt or volcanic breccia

Mafic volcanic rock, likely basalt; composition dominated by plagioclase and pyroxene with iron oxides

Likely weathered sandstone or iron-stained quartzite fragment (Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)) — sedimentary

Likely weathered sandstone or iron-stained quartzite fragment

Quartz-rich sandstone (predominantly SiO₂; exact identification uncertain from image)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sea Shell (Mollusk Shell) (Calcium Carbonate (Aragonite/Calcite)) — fossil

Sea Shell (Mollusk Shell)

Calcium Carbonate (Aragonite/Calcite)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Quartz (Orange/Pink variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)