Rock Identifier

Category

Synthetic Polymer (Synthetic Material)

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

Snowflake Obsidian (or similar porphyritic volcanic rock) (Obsidian with Spherulites (if glassy), or Porphyritic Rhyolite/Andesite (if crystalline groundmass)) — igneous

Snowflake Obsidian (or similar porphyritic volcanic rock)

Obsidian with Spherulites (if glassy), or Porphyritic Rhyolite/Andesite (if crystalline groundmass)

Blue Quartzite (Quartzite with inclusions (SiO2)) — metamorphic

Blue Quartzite

Quartzite with inclusions (SiO2)

Tektite (specifically Indochinite) (Tektite (Natural silica glass)) — Mineraloid (Impact glass)

Tektite (specifically Indochinite)

Tektite (Natural silica glass)

Mineraloid (Impact glass)

Granite (Granite) — igneous

Granite

Granite

Malachite (Malachite [Cu2CO3(OH)2]) — mineral

Malachite

Malachite [Cu2CO3(OH)2]

Chert (Yellow/Brown variety) (Chert (SiO2)) — sedimentary

Chert (Yellow/Brown variety)

Chert (SiO2)

Granite (Granite (Phaneritic Quartz-Feldspar Felsic Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Mother of Pearl (Nacre) (Calcium Carbonate (primarily aragonite, with conchiolin)) — Organic Gemstone/Biomineral

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)

Organic Gemstone/Biomineral

Sandstone (Quartz Sandstone (predominantly)) — Sedimentary

Sandstone

Quartz Sandstone (predominantly)

Chert / Pink Chert (Silicon Dioxide (SiO2)) — sedimentary

Chert / Pink Chert

Silicon Dioxide (SiO2)

Chert Nodule (Commonly known as Flint or River Rock) (Silicon Dioxide (SiO2)) — sedimentary

Chert Nodule (Commonly known as Flint or River Rock)

Silicon Dioxide (SiO2)

Schist (specifically Mica Schist) (Mica Schist) — metamorphic

Schist (specifically Mica Schist)

Mica Schist

Biotite Schist (Biotite Schist) — metamorphic

Biotite Schist

Biotite Schist

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Kyanite (Kyanite (Al2SiO5)) — mineral

Kyanite

Kyanite (Al2SiO5)

Chert (Yellow Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2) with iron impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron impurities

Chert (with Quartz veins) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (with Quartz veins)

Microcrystalline quartz (SiO2)

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

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Red Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Rainbow Obsidian (Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)) — Igneous

Rainbow Obsidian

Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)

Obsidian (specifically Rainbow or Silver Sheen Obsidian) (Volcanic Glass (predominantly SiO2)) — Igneous

Obsidian (specifically Rainbow or Silver Sheen Obsidian)

Volcanic Glass (predominantly SiO2)

Chert (and Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and Chalcedony)

Microcrystalline Quartz (SiO2)

Red Jasper (River Polished Quartzite) (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) impurities) — sedimentary

Red Jasper (River Polished Quartzite)

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

Ferruginous Quartzite (Red Sandstone/Quartzite) (Quartzite with Iron inclusions (SiO2 + Fe2O3)) — metamorphic

Ferruginous Quartzite (Red Sandstone/Quartzite)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Granodiorite Pebble (Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite/Amphibole)) — igneous

Granodiorite Pebble

Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite/Amphibole)

Chert (Chalcedony/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate variety)

Microcrystalline Quartz (SiO2)

Puddingstone (Conglomerate (typically quartz-rich or jasper-rich)) — sedimentary

Puddingstone

Conglomerate (typically quartz-rich or jasper-rich)

Sandstone (specifically Arkose or Ferruginous Sandstone) (Sandstone (SiO2 with iron oxide inclusions)) — sedimentary

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Chert (White/Light Tan) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (White/Light Tan)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Novaculite variant) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (specifically Flint or Novaculite variant)

Chert (Microcrystalline Quartz, SiO2)

Chert (specifically Flint or Jasper variant) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Common Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Common Chert)

Microcrystalline Quartz (SiO2)

Chert / Flint Nodule (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert / Flint Nodule

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Jasper and Quartz River Pebble (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper and Quartz River Pebble

Silicon Dioxide (SiO2) with impurities

Chert (Gravel specimen) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Gravel specimen)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Chert (River Stone/Pebble) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Yellow Chert (River Stone/Pebble)

Chert (Cryptocrystalline Quartz, SiO2)

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

Chert

Chert (Microcrystalline Silica, SiO2)

Banded Agate (specifically Sardonyx or Red Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (specifically Sardonyx or Red Agate)

Silicon Dioxide (SiO2)

Red Jasper (SiO2 (Silicon Dioxide with Iron inclusions)) — sedimentary

Red Jasper

SiO2 (Silicon Dioxide with Iron inclusions)

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

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions - SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions - SiO2)