Grey Chalcedony
Silicon Dioxide (SiO2)
Category
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
Grey Chalcedony
Silicon Dioxide (SiO2)
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various additives
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Chert (Flint)
Microcrystalline Quartz (SiO2)
Pyrite in Matrix
Iron Sulfide (FeS2)
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
Chert (Flint)
Microcrystalline Quartz (SiO2)
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Chert (and Flint)
Silicon Dioxide (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Flint
SiO2 (Cryptocrystalline Quartz)
Lapis lazuli and green-blue chalcedony jewelry
Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Chert / Green Jasper
Silicon Dioxide (SiO2)
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Chert or Jasper
Microcrystalline Quartz (SiO2)
Ruby in Matrix
Corundum (Al2O3)
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
Quartzite
Metamorphic Rock (Mainly SiO2)
Obsidian
Volcanic glass
Chert (Flint)
Silicon Dioxide (SiO2)
Diamond
Diamond (pure carbon; C)
Sandstone
Arenite (SiO2 principal)
Quartzite
Metamorphic Quartzite (SiO2)
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
Diamond
Carbon (C)
Diamond
Carbon (C)
Quartzite
Metamorphic Quartzite (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
Quartzite
Metamorphic Quartzite (SiO2)
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna