White chalcedony or quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly with minor calcite or feldspar
Category
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
White chalcedony or quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly with minor calcite or feldspar
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Quartz Vein in Matrix
Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix
Tektite
Tektite (meteoritic glass)
Milky Quartz with Chlorite/Epidote inclusions
Silicon Dioxide (SiO2) with phyllosilicate/sorosilicate inclusions
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Yellow Aventurine (specifically a carved crescent moon)
Silicon Dioxide (SiO2) with inclusions
Likely weathered brown quartz-bearing rock
Tentatively weathered granite or granitic gneiss; exact identification is uncertain from the photograph
Milky quartz pebble
Quartz (SiO₂), commonly called milky quartz
White Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sandstone (Pebble)
Arenite (SiO2 based)
Tumbled chalcedony (likely carnelian/opaque agate)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining
Smoky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
Quartz Pebble (Milky and Gray)
Quartz (Silicon Dioxide, SiO2)
Silicon
Silicon (Si)
Quartz Pebble
Silicon Dioxide (SiO2)
Likely polished garnet
Garnet group; probably almandine, iron-aluminum silicate (Fe₃Al₂Si₃O₁₂)
Snowflake Obsidian
Volcanic Glass with Spherulitic Cristobalite (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz in Matrix
Silicon Dioxide (SiO2)
Polished dendritic agate or jasper
Microcrystalline quartz (SiO₂), likely chalcedony with manganese-oxide dendrites
Tektite (Indochinite)
Natural glass (High-silica impact glass)
Milky Quartz
Silicon Dioxide (SiO2)
Clear quartz (likely quartz crystal fragment)
Quartz, silicon dioxide (SiO₂)
Quartz pebble
Silicon dioxide (SiO2)
Clear Quartz (Crystal Quartz)
Silicon Dioxide (SiO2)
White Topaz
Al2SiO4(F,OH)2
Fluorite
Calcium Fluoride (CaF2)
Blue Sapphire
Corundum (Al2O3)
Quartz Crystal Cluster
Silicon Dioxide (SiO2)