Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Category
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Amethyst Cluster
Silicon Dioxide with Iron impurities (SiO2)
Quartz
Silicon dioxide (SiO₂)
Chert (and Flint)
Silicon Dioxide (SiO2)
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
River Pebbles (Chert and Quartzite)
Sedimentary Clastic Rock (Silica-rich)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Chert (specifically Jasper or Flint variety)
Cryptocrystalline Quartz (SiO2)
Chert
Sedimentary cryptocrystalline quartz (SiO2)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
Tektite
Impactite (Natural Silicate Glass)
Diamond (or Diamond Simulant)
Carbon (C)
Obsidian
Obsidian (volcanic glass)
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
Pyrite in Matrix
Iron Sulfide (FeS2)
Chert (Tan/Brown variety)
Chert (Silicon Dioxide, SiO2)
Chert / Green Jasper
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 principal)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Chert (SiO2)
Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate
Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
Basalt
Basalt
Chert (often called Flint for darker varieties)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (and Jasper/Flint variety)
Cryptocrystalline Quartz (SiO2)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Flint
Sedimentary cryptocrystalline quartz (SiO2)
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
Diamond
Carbon (C)
Chert / Flint
Silicon Dioxide (SiO2)