Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Blue glassy gemstone cabochon, likely dyed chalcedony or glass
Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)
gemstone
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Crackled Quartz (Dyed)
Silicon Dioxide (SiO2)
mineral
Tumbled yellow jasper (likely iron-stained chalcedony)
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Quartz crystal (likely clear quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Opalite
Synthetic Glass (Simulated Moonstone/Opal)
gemstone
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Polished white chalcedony or quartz pendant
Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image
gemstone
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
mineral
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Goldstone
Man-made glass infused with copper crystals
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Milky quartz (likely rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral
Blue obsidian-like volcanic glass
Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)
igneous
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Opalite
Synthetic Opalised Glass
mineraloid (synthetic)
Goldstone
Aventurine glass
mineral (man-made glass)
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Opalite-style pendant (likely synthetic glass, not natural opal)
Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)
gemstone
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
sedimentary
Sandstone Concretion
Siliciclastic Concretion
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Amorphous Solid
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Sea Glass
Man-made vitreous material (silica glass)
sedimentary
Opalite
Synthetic Opalised Glass
glass
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
sedimentary