Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Andesite
Andesite (intermediate volcanic rock)
igneous
Green Andesite (or Greenstone / Altered Volcanic Rock)
Intermediate Volcanic Rock with Chlorite/Epidote Alteration
igneous
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Rose Quartz (SiO2)
mineral
Schist
Mica Schist
metamorphic
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
sedimentary
Painted Sandstone
Sandstone (clastic sedimentary rock) with acrylic/artistic coating
sedimentary
Diamond
Carbon (C)
gemstone
Raw gold nugget or gold-bearing quartz
Native gold (Au), possibly with quartz (SiO₂) and iron-oxide staining
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Serpentinite
Serpentinite (complex of lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Rough Diamond
Diamond (C)
mineral
Coral Fossil (Petrified Coral)
Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)
sedimentary
Green Jasper / Plasma
Microcrystalline Quartz (Chalcedony), SiO2 with inclusions
gemstone
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Basalt
Basalt (Fine-grained extrusive igneous rock)
igneous
Olivine-bearing Basalt / Scoria
Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)
igneous
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Chert (Yellow/Brown variety)
Chert (SiO2)
sedimentary
Diamond
Diamond (pure carbon, C)
mineral
Basalt with Quartz/Calcite Vein
Aphanitic Mafic Volcanic Rock with Quartz (SiO2) or Calcite (CaCO3) Vein
igneous
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Chert (specifically Flint or Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (siliciclastic sedimentary rock composed mostly of quartz)
sedimentary
Diamond (Rough)
Diamond (C)
Mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Banded Sandstone (Wonderstone)
Sandstone with Liesegang Rings (SiO2 with Iron Oxides)
sedimentary
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Garnet-Mica Schist
Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)
metamorphic
Limestone
Calcite (CaCO3)
sedimentary
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pink Granite
Granite (Felsic intrusive igneous rock)
igneous