Chert
Chert (Microcrystalline Silica, SiO2)
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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Diorite
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Mineral
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Chert (and Jasper blend)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Pegmatite (Granitic)
Granite Pegmatite
igneous
Coal
Biogenic sedimentary rock (Carbon)
sedimentary
Limestone Pebble
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Chlorastrolite (Greenstone)
Chlorastrolite (variety of Pumpellyite) - Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2 · H2O
mineral
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Granite
Phaneritic intrusive felsic igneous rock
igneous
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Bone Fragment
Vertebrate Fossil Material (Apatite/Calcium Phosphate)
fossil
Basalt (River Stone)
Basalt
igneous
Tree Agate (or Moss Agate)
Dendritic Agate (Silicon Dioxide - SiO2)
mineral
Rough Diamond
Carbon (C)
gemstone
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Diorite (with Iron Staining)
Phaneritic Intermediate Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Rutilated Quartz
SiO2 with TiO2 inclusions
Mineral
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
sedimentary
Sandstone (Water-worn)
Arenite
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3) - Sparry Limestone
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide - SiO2)
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Fossil brachiopod shell
Likely spiriferid or strophomenid brachiopod; calcium carbonate (primarily calcite)
fossil
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Quartzite Breccia
Brecciated Quartzite (SiO2)
metamorphic
Fossil-bearing limestone
Bioclastic limestone, likely containing bivalve or brachiopod impressions
fossil
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral