Rock Identifier

Category

Mineraloid Like Synthetic Material

Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.

Learn about Mineraloid Like Synthetic Material in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Shungite

Zincite

Opalite

Lead Feldspar

Peat

Blue Line Jasper

Lime Green Tourmaline

Lime Green Tourmaline

Argillite

Needle Tourmaline

Needle Tourmaline

Calc-Silicate Rock

Calc-Silicate Rock

Color-Change Tourmaline

Color-Change Tourmaline

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

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

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled quartz pebble (Quartz (SiO₂), likely milky or iron-stained quartz) — mineral

Tumbled quartz pebble

Quartz (SiO₂), likely milky or iron-stained quartz

Fossil Coral (Rugosa or Tabulata coral fossil (Calcite/Silica replacement)) — fossil

Fossil Coral

Rugosa or Tabulata coral fossil (Calcite/Silica replacement)

Polished green aventurine (likely) (Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica) — mineral

Polished green aventurine (likely)

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica

Uraninite (Pitchblende) (Uranium dioxide (UO2)) — mineral

Uraninite (Pitchblende)

Uranium dioxide (UO2)

Ferruginous Conglomerate (Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))) — sedimentary

Ferruginous Conglomerate

Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))

Sandstone with Iron Staining (Arenite (SiO2 with Fe-oxide coatings)) — sedimentary

Sandstone with Iron Staining

Arenite (SiO2 with Fe-oxide coatings)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Ferruginous) (Arenite with Iron Oxide staining (Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Quartz Pebble with Hematite Inclusion (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble with Hematite Inclusion

Silicon Dioxide (SiO2)

Iron-stained garnet-bearing rock, possibly almandine garnet (Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix) — mineral

Iron-stained garnet-bearing rock, possibly almandine garnet

Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix

Chert or flint fragment (Microcrystalline quartz (SiO₂), commonly called chalcedony or flint) — sedimentary

Chert or flint fragment

Microcrystalline quartz (SiO₂), commonly called chalcedony or flint

Sandstone (Arenite (SiO2 main component)) — sedimentary

Sandstone

Arenite (SiO2 main component)

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

Sandstone (Pebble)

Sandstone (principally SiO2 with iron oxide impurities)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Rose Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Rose Quartz

Quartz (Silicon Dioxide - SiO2)

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Siltstone (Siltstone) — sedimentary

Siltstone

Siltstone

Chert (Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon dioxide (SiO2)

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

Yellow Chert

Chert (Cryptocrystalline Quartz, SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Jasper (Petrified Wood Variety) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Petrified Wood Variety)

Silicon Dioxide (SiO2)

Chert (specifically Blue or Grey Chert/Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Blue or Grey Chert/Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Gastropod Fossil (Snail Steinkern) (Class Gastropoda (internal mold)) — sedimentary

Gastropod Fossil (Snail Steinkern)

Class Gastropoda (internal mold)

Chert (Red/Pink Jasper subtype) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Red/Pink Jasper subtype)

Silicon Dioxide (SiO2)

Jasper River Stone (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper River Stone

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite (Metamorphic Quartz Rock (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz Rock (SiO2)

Banded Iron Formation (BIF) / Jasper (Banded Iron Formation (primarily Quartz/SiO2 and Hematite/Fe2O3)) — sedimentary

Banded Iron Formation (BIF) / Jasper

Banded Iron Formation (primarily Quartz/SiO2 and Hematite/Fe2O3)

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

Sandstone (Red Sandstone)

Arenite (predominantly SiO2 with Fe2O3 cement)

Banded Iron Formation (Jaspillite) (Banded Iron Formation (BIF) / Jaspillite) — sedimentary

Banded Iron Formation (Jaspillite)

Banded Iron Formation (BIF) / Jaspillite

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

Jasper

Silicon dioxide (SiO2) with impurities

Limestone (Sedimentary rock composed primarily of calcium carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed primarily of calcium carbonate (CaCO3)

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

Chert (Flint/Nodule)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Granite Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Red Sandstone (Iron-Rich) (Arenite (Fe2O3)) — sedimentary

Red Sandstone (Iron-Rich)

Arenite (Fe2O3)