Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
Learn about Man Made Glass in the encyclopedia
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Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
man-made silicate (anthropogenic glass)
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Faceted gemstone in a jewelry setting
Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone
gemstone
Chert
Chert (SiO2)
sedimentary
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Faceted glass-like gemstone object
Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image
gemstone
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Blue faceted gemstone ring, likely synthetic sapphire or blue topaz
Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)
gemstone
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Jasper Marble
Silicon Dioxide (SiO2) with Impurities
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert or silicified sedimentary fragment (tentative)
Microcrystalline quartz (SiO₂), possibly silicified limestone or fossil-bearing chert
sedimentary
Tumbled brown chalcedony or agate
Microcrystalline quartz (SiO₂), likely chalcedony; possibly iron-stained jasper or agate
gemstone
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Rounded quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Goldstone (Red)
Aventurine Glass
Man-made material (Simulated Mineral)
Flint
Silicon dioxide (Microcrystalline Quartz / Chert)
sedimentary
Quartzite
Quartzite (Metamorphosed Sandstone)
metamorphic
Chert
Microcrystalline quartz (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
metamorphic
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
mineral
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartz Arenite
metamorphic
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Chert
Microcrystalline silica (SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Silica (SiO2) quartzite
metamorphic