Quartzite Pebble
Quartzite (SiO2)
metamorphic
Category
Industrial Byproduct (Anthropogenic Material)
Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Anthropogenic Material) in the encyclopedia
View all →
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary
Quartz Chip
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gray Limestone Pebble
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Brown Jasper / River Siltstone
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 cement)
sedimentary
Coquina or Fossilized Shell Aggregate
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Amazonite
K(AlSi3O8), Microcline (potassium feldspar)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Chert Nodule in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Fulgurite
Fulgurite (Lechatelierite/Silica glass)
mineral
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Common Opal)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
mineral
Jasper Agate
Silicon dioxide (SiO2)
mineral
Jasper (Nephrite-like appearance)
Silicon Dioxide (SiO2) with impurities
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Wood Paneling
Engineered Wood / Plywood Paneling
not a rock
Peridot (Olivine)
Olivine ((Mg,Fe)2SiO4)
Mineral
Likely obsidian (black volcanic glass)
Obsidian; predominantly rhyolitic volcanic glass, often ~70–75% SiO₂
igneous
Pyrite
Iron Pyrite (FeS₂)
Mineral
Opalite
Synthetic Opalite (Man-made glass)
mineral
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) within a resin matrix
igneous
Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary