Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Category
Sedimentary (Man Made)
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
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Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
mineral
Ocean Jasper Mushroom
Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)
mineral
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Opalite glass sphere (likely synthetic imitation)
Man-made opalescent glass; not natural opal
mineral
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Colorless quartz crystal (likely quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Aura Rose Quartz
SiO2 (Silicon Dioxide with Titanium/Gold coating)
mineral
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
gemstone
Aura Quartz (Titanium-coated Quartz)
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Fossiliferous limestone with colonial coral
Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies
fossil
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
White quartz pebble or chip
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Tumbled white chalcedony (likely milky quartz)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Goldstone (Brown)
Aventurine Glass (Silicon Dioxide infused with Copper crystals)
mineraloid (man-made glass)
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Polished black pebble, likely basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Opalite
Synthetic Opalised Glass
mineral
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Opalite (a synthetic glass)
Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant
Mineral Simulant (Synthetic Glass)
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Rainbow Hematite (Man-made/Treated)
Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)
mineral
Libyan Desert Glass
Libyan Desert Glass (SiO2 with trace elements)
mineral (impactite)