Quartzite (River Pebble)
Quartzite (Mainly SiO2)
Category
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
Chert (Flint)
Silicon Dioxide (SiO2)
Sandstone
Arenite
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
Obsidian
Volcanic Glass (Amorphous SiO2)
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Quartzite
Quartzite (SiO2)
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
Smoky Quartz
Silicon Dioxide (SiO2)
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone
Arenite (variable SiO2 composition)
Granite
Phaneritic Felsic Igneous Rock
Sandstone
Arenite (composed primarily of SiO2)
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Sea Glass (Turquoise/Aqua)
Amorphous Silica (SiO2) with transition metal dopants
Chert (variations include Flint/Novaculite)
Chert (formula: SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Chert (often called Flint)
Chert (SiO2)
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)