Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Category
Mineraloid (Man Made)
Browse mineraloid (man made) specimens identified by the Rock Identifier community.
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Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
sedimentary
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Sandstone
Arenite (primarily SiO2)
sedimentary
Tumbled orange chalcedony and a gray stone disk
Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate
mineral
Diamond
Carbon (C)
gemstone
Sandstone
Clastic Sedimentary Rock
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Quartzite
Metamorphic Quartzite
metamorphic
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Basalt
Basalt
igneous
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Basalt
Basalt (Mafic volcanic rock)
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Diamond
C (Pure Carbon)
gemstone
Diamond
Carbon (C)
mineral
Quartzite
Quartzite (Metamorphosed Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Chert (Siltstone / Flint)
SiO2 (Cryptocrystalline Quartz)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary
Red Quartzite
Quartzite (Metamorphic quartz sandstone)
metamorphic
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone
Arenite (variable SiO2 composition)
sedimentary
Diamond
Carbon (C)
mineral
Diamond
Carbon (C)
mineral
Diamond
Carbon (C)
mineral
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Raw calcite specimen
Calcite, calcium carbonate (CaCO₃)
mineral