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

Red Sandstone (Arenite (with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide)

Sandstone (Arenite (compositionally various, primarily SiO2)) — sedimentary

Sandstone

Arenite (compositionally various, primarily SiO2)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Chert (Flint Nodules) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint Nodules)

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite/Arkosic sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkosic sandstone)

Green Greenstone / Celadonite-bearing Metamorphic Rock (Greenschist / Celadonite / Serpentinitic pebble) — metamorphic

Green Greenstone / Celadonite-bearing Metamorphic Rock

Greenschist / Celadonite / Serpentinitic pebble

Banded Serpentinite (Beach Pebble) (Serpentine-group silicate rock ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe,Al)2O5(OH)4)) — metamorphic

Banded Serpentinite (Beach Pebble)

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

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

Sandstone

Arenite (composed primarily of SiO2)

Septarian Nodule (Pebble) (Septarian concretion (composition: CaCO3, calcite, aragonite, and clay/mudstone)) — sedimentary

Septarian Nodule (Pebble)

Septarian concretion (composition: CaCO3, calcite, aragonite, and clay/mudstone)

Sandstone (Water-worn Cobble) (Arenite (variable composition, primarily SiO2)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Red Sandstone (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)

Red Siltstone (Siltstone (composed of Quartz and Clay minerals)) — sedimentary

Red Siltstone

Siltstone (composed of Quartz and Clay minerals)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Conglomerate (Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)) — sedimentary

Conglomerate

Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Flint (within Limestone matrix) (Silicon dioxide (SiO2)) — sedimentary

Flint (within Limestone matrix)

Silicon dioxide (SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class) - likely Carcharodon or Otodus genus) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class) - likely Carcharodon or Otodus genus

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

Chert (Fossiliferous)

Silicon dioxide (SiO2)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Fossilized Oyster in Flint (Gryphaea or Exogyra embedded in SiO2 (Flint/Chert)) — fossil

Fossilized Oyster in Flint

Gryphaea or Exogyra embedded in SiO2 (Flint/Chert)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Quartz (Microcrystalline/Chert) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Chert / Flint (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Basalt with Quartz/Feldspar Inclusions (Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining) — igneous

Basalt with Quartz/Feldspar Inclusions

Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining

Chert (and its variety Flint) (Silicon dioxide (SiO2) / Microcrystalline quartz) — sedimentary

Chert (and its variety Flint)

Silicon dioxide (SiO2) / Microcrystalline quartz

Raw Diamond (Diamond (pure Carbon, C)) — mineral

Raw Diamond

Diamond (pure Carbon, C)

Chert Pebble (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (v. Flint) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (v. Flint)

Sedimentary Cryptocrystalline Quartz (SiO2)

Polished opal-like chalcedony (Cryptocrystalline silica, SiO₂; likely common opal or pale chalcedony, with identification limited by the photograph) — gemstone

Polished opal-like chalcedony

Cryptocrystalline silica, SiO₂; likely common opal or pale chalcedony, with identification limited by the photograph

Weathered quartz-rich stone, possibly fossiliferous limestone (Indeterminate; likely calcite-rich limestone (CaCO₃) or weathered quartz-bearing rock) — sedimentary

Weathered quartz-rich stone, possibly fossiliferous limestone

Indeterminate; likely calcite-rich limestone (CaCO₃) or weathered quartz-bearing rock

Greenstone (Metabasalt / Greenschist facies rock) — metamorphic

Greenstone

Metabasalt / Greenschist facies rock

Chert (Tan/Brown) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Tan/Brown)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Petrified Wood

Silicified Wood (primarily SiO2)

Rough Diamond (Diamond (C)) — mineral

Rough Diamond

Diamond (C)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Nuummite (Orthoamphibole (Gedrite-Anthophyllite series)) — metamorphic

Nuummite

Orthoamphibole (Gedrite-Anthophyllite series)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)