Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Category
Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)
Browse man made byproduct (often mistaken for obsidian or emerald) specimens identified by the Rock Identifier community.
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Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Blue Goldstone
Man-made glass with cobalt and metal flecks
man-made glass
Opalite-style glass pendant
Man-made opalescent glass (not natural opal)
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Obsidian
Obsidian (volcanic glass)
Igneous
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Blue sea glass or blue glassy mineral fragment
Uncertain; likely man-made soda-lime glass, not a natural mineral
mineral
Pink Tumbled Quartz (Dyed)
Silicon Dioxide (SiO2)
mineral
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Dyed Agate
Chalcedony (SiO2)
mineral
Opalite
Synthetic Opalised Glass
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)
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
mineral
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Dyed Imperial Jasper (Sea Sediment Jasper)
Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony
sedimentary
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Polished white chalcedony or quartz pendant
Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image
gemstone
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Opalite
Man-made Glass (Synthetic Opalized Glass)
gemstone
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Crackle Quartz (Dyed Quarzite)
Silicon Dioxide (SiO2) with artificial dye
Metamorphic (modified)
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Opalite
Synthetic opalescent glass
glass