Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia
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Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
sedimentary
Yellow Jasper
Silica (Silicon Dioxide, SiO2) with iron inclusions
sedimentary
Coquina
Biogenic Limestone (Calcite/Aragonite)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Coquina
Biogenic Limestone (Coquina)
sedimentary
Crushed Limestone
Sedimentary Calcite/Dolomite Rock (CaCO3)
sedimentary
Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)
Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)
metamorphic
Tumbled Jasper and Tiger's Eye
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Silicon dioxide, SiO2
Mineral
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Industrial byproduct (often confused with igneous rocks or meteorites)
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Limestone (Carved Statue)
Calcium Carbonate (CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
sedimentary
Quartzite
Metamorphic quartz rock (SiO2)
metamorphic
Painted Pet Rock (Quartzite/Sandstone base)
Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments
sedimentary
Dragon Vein Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Greywacke (Sandstone)
Lithic wacke
sedimentary
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nHeO)
mineral
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Gold Nugget
Native Gold (Au)
mineral
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Coquina
Biogenic Limestone
sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Beach Pebble (Chalcedony / Chert)
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
gemstone
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Tufa
Calcareous Tufa (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary