Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Category
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Diamond
Carbon (C)
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
Sandstone Concretion
Sedimentary concretion
Mixed gemstone bead bracelet
Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads
Amethyst and aquamarine gemstone bracelet
Amethyst: purple quartz, SiO₂; blue beads likely aquamarine/blue quartz, with possible metallic spacer beads
Quartzite
Metamorphic Quartz Arenite
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Gemstone ring (stones not reliably identifiable from the image)
Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually
Chert
Microcrystalline silica (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Chert / Jasper
Silicon Dioxide (SiO₂)
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Quartzite
Metamorphic Quartz Sandstone
White pebbles (rock material not identifiable from the image)
Undetermined; the smooth, pale pieces could be quartz, quartzite, or another light-colored rock
Diamond
Diamond (pure Carbon, C)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
Slag Glass / Industrial Slag
Anthropogenic Glass
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Blue faceted gemstone, likely synthetic sapphire or blue glass
Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually
Yellow faceted gemstone, likely citrine or yellow sapphire
Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite pebble
Quartzite (SiO2)
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin