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

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Serpentine (Serpentinite)

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Sandstone (Pebble) (Sandstone (principally SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Pebble)

Sandstone (principally SiO2 with iron oxide impurities)

Granitic Gneiss Pebble (Gneiss (felsic metamorphic rock)) — metamorphic

Granitic Gneiss Pebble

Gneiss (felsic metamorphic rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Sandstone (Quartzose/Feldspathic Sandstone)) — sedimentary

Sandstone

Sandstone (Quartzose/Feldspathic Sandstone)

Sandstone (Garden Boulder) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Garden Boulder)

Sandstone (SiO2 dominated)

Red Sandstone (Arenite (Hematitic / Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Hematitic / Ferruginous Sandstone)

Sandstone (Pebble) (Sandstone) — sedimentary

Sandstone (Pebble)

Sandstone

Flint (chert), possibly fossil-bearing (Microcrystalline quartz (SiO₂), chalcedony/flint variety) — sedimentary

Flint (chert), possibly fossil-bearing

Microcrystalline quartz (SiO₂), chalcedony/flint variety

Rounded dark river pebble (Likely fine-grained basalt or andesite; exact identification requires a fresh surface or tests) — sedimentary

Rounded dark river pebble

Likely fine-grained basalt or andesite; exact identification requires a fresh surface or tests

Milky quartz (Quartz (SiO₂), commonly massive or vein quartz) — mineral

Milky quartz

Quartz (SiO₂), commonly massive or vein quartz

Raw green aventurine (likely quartzite) (Quartz-rich quartzite, chiefly microcrystalline SiO₂ with green mica/fuchsite or chlorite) — metamorphic

Raw green aventurine (likely quartzite)

Quartz-rich quartzite, chiefly microcrystalline SiO₂ with green mica/fuchsite or chlorite

$Tumbled quartz pebble (Quartz (SiO₂), likely milky or fractured rock crystal) — mineral$

Tumbled quartz pebble

Quartz (SiO₂), likely milky or fractured rock crystal

Banded sandstone pebble (Lithic or quartz-rich sandstone; exact composition requires testing) — sedimentary

Banded sandstone pebble

Lithic or quartz-rich sandstone; exact composition requires testing

Iron meteorite fragment (Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment) — meteorite

Iron meteorite fragment

Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Limestone (Sedimentary Rock (Primarily CaCO3)) — sedimentary

Limestone

Sedimentary Rock (Primarily CaCO3)

Quartzite (Metamorphic Quartz Rock (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz Rock (SiO2)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - Chalcedony with Iron Oxide impurities) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony with Iron Oxide impurities

Quartz Beach Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Beach Pebble

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Quartzite Pebble (Metaquartzite) — metamorphic

Quartzite Pebble

Metaquartzite

Banded Siltstone (Siltstone (primarily composed of silt-sized grains)) — sedimentary

Banded Siltstone

Siltstone (primarily composed of silt-sized grains)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Basalt Cobble (Aphanitic Mafic Volcanic Rock (Basalt)) — igneous

Basalt Cobble

Aphanitic Mafic Volcanic Rock (Basalt)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Sandstone (Limonitic/Arkose) (Sandstone (primarily SiO2 with FeO(OH)·nH2O)) — sedimentary

Sandstone (Limonitic/Arkose)

Sandstone (primarily SiO2 with FeO(OH)·nH2O)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Quartzite (with Iron Staining) (Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)) — metamorphic

Quartzite (with Iron Staining)

Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)

Sandstone (Arenite (SiO2 with minor iron oxides)) — sedimentary

Sandstone

Arenite (SiO2 with minor iron oxides)

Sandstone (likely Arkosic or Ferruginous) (Arenite (SiO2 with iron oxides or feldspar)) — sedimentary

Sandstone (likely Arkosic or Ferruginous)

Arenite (SiO2 with iron oxides or feldspar)

Sandstone (Red/Brown) (Arenite (SiO2 dominated with iron oxides)) — sedimentary

Sandstone (Red/Brown)

Arenite (SiO2 dominated with iron oxides)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss