Diamond
Diamond (pure Carbon, C)
Category
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Diamond
Diamond (pure Carbon, C)
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert / Flint
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Chert
Chert (SiO2)
Quartzite
Metamorphic Quartz Rock (SiO2)
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Quartzite
Metamorphic Quartz Sandstone
Sandstone
Arenite (with iron oxide cement)
Chert / Jasper
Silicon Dioxide (SiO₂)
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Carved quartz (likely rose quartz and green aventurine/quartz)
Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine
Diamond
Carbon (C)
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Chert
Microcrystalline Quartz (SiO2)
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Quartzite
Quartzite (Metamorphosed Sandstone)
Flint
Silicon dioxide (Microcrystalline Quartz / Chert)
Chert
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Sandstone Concretion
Sedimentary concretion
Chert (and Flint)
Silicon Dioxide (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartz Arenite
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert / Green Jasper
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline silica (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)