Chert (and/or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Category
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Chert (and/or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Black Flint)
Silicon Dioxide (SiO2)
Chert (and/or Flint)
Microcrystalline Quartz (SiO2)
Sandstone Concretion
Sedimentary concretion
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
Slag
Anthropogenic glassy silicate
Chert (Flint)
Silicon dioxide (SiO2)
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Chert (Flint)
Chert (SiO2)
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
Iron Slag
Anthropogenic pyrometallurgical residue
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
Diamond ring
Diamond, crystalline carbon (C)
Chert (Green Chert or Jasper)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
Chert
Microcrystalline Silicon Dioxide (SiO2)
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Flint / Chert
Silicon dioxide (SiO2)
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Likely iron-rich rock or weathered metallic mineral fragment
Uncertain; possibly limonite/goethite or iron-bearing slag
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
Coquina
Bioclastic Limestone
Chert (specifically White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
N/A - Image does not contain a rock or mineral
Anthropogenic textile material