Shale
Laminated Mudstone (Shale)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock)
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
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Calcite
Calcium Carbonate (CaCO3)
mineral
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Pyrite (on Quartz matrix)
Iron Disulfide (FeS2)
mineral
Concretion
Sedimentary Concretion
sedimentary
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid
Kimberlite
Kimberlite
igneous
Queen Conch Shell (Biogenic Calcium Carbonate)
Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)
mineral
Quartzite River Stone
Quartzite (SiO2)
metamorphic
Basalt
Basalt
igneous
Vesicular Basalt (Lava Rock)
Basalt
igneous
Coal
Combustible sedimentary rock
sedimentary
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
The user-provided image does not contain a rock or mineral specimen
N/A
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
mineral
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous
Quartz and Iron Oxide
Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Tumbled White Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian Arrowhead
Volcanic Glass (Primary composition: SiO2)
igneous
Shale
Shale (claystone/mudstone)
sedimentary
Basalt with Weathering Rind
Basalt (Mafic Volcanic Rock)
igneous
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Sandstone Cobble with Iron Staining
Arenite with Limonite/Hematite staining
sedimentary
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
sedimentary
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
mineral
River Stone (likely Basalt or Greywacke)
Basalt with mineral veining
igneous
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Native Copper in Matrix
Native Copper (Cu)
mineral
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Coal
Biogenic sedimentary rock (Carbon)
sedimentary
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium carbonate (CaCO3)
sedimentary
Basalt (River Stone)
Basalt
igneous
Limestone Cobble
Carbonate Rock (CaCO3)
sedimentary