Sandstone
Arenite (composed primarily of SiO2)
Category
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2)
Chert (and/or Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Sandstone
Arenite
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
Quartz
Silicon dioxide (SiO₂)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Jasper
Silicon Dioxide (SiO2)
Chert (and Flint)
Silicon Dioxide (SiO2)
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Chert (specifically Jasper or Flint variety)
Cryptocrystalline Quartz (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Chert (Tan/Brown variety)
Chert (Silicon Dioxide, SiO2)
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Chert (SiO2)
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (and associated river cobbles)
Silicon dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
Diamond (or Diamond Simulant)
Carbon (C)
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Obsidian
Obsidian (volcanic glass)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)