Diamond
Native Carbon (C)
Category
Browse mineral (man made aura treatment) specimens identified by the Rock Identifier community.
Diamond
Native Carbon (C)
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
Sandstone Concretion
Limonitic Sandstone Concretion
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Opalite
Man-made opalescent glass
Sea Glass
Man-made silicate glass
Slag Glass
Amorphous Silicate (Man-made)
Ring with an Orange Inlay
N/A (Man-made object)
Sea Glass
Man-made silicate glass
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Aluminum Slag
Anthropogenic Aluminum (Al)
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
Yellow chalcedony (likely agate) cabochons
Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
Small pebble, likely limestone
Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
Multicolor quartz bead bracelet
Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
Blue glassy gemstone-like specimen
Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
Opalite
Man-made Glass (Synthetic Opalized Glass)
Milky quartz
Quartz (silicon dioxide, SiO₂)
Concrete
Anthropogenic Conglomerate
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
Unidentifiable Rock Fragment
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
Opalite Egg
Synthetic Glass (Simulated Opal)
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
Blue opalite glass cabochon (likely imitation opal)
Man-made opalescent glass; not a natural mineral