Red Sandstone or Brick Fragment
Arenite (if sandstone)
sedimentary
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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Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Green Fuchsite in Quartz (sometimes called Green Aventurine)
Fuchsite (Chrome-rich Muscovite) K(Al,Cr)2(AlSi3O10)(OH)2 in Quartz SiO2
metamorphic
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Man-made byproduct (Non-geological)
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Engineerged Quartz (Quartz Composite)
SiO2 (Silicon Dioxide) in a polymer resin matrix
mineral
Crackle Agate / Dyed Quartz
SiO2 (Silicon Dioxide)
mineral
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Opalite
Synthetic Opalite (Man-made glass)
mineral
Obsidian
Obsidian (volcanic glass)
Igneous
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Obsidian
Obsidian (volcanic glass, amorphous silica rich rock)
Igneous
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Pink Tumbled Quartz (Dyed)
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
Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
sedimentary
Mohave Turquoise (Composite/Stabilized)
Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions
mineral
Opalite
Synthetic Opalised Glass
mineral
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Dyed Agate
Chalcedony (SiO2)
mineral
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
mineral
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
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)
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Blue Goldstone
Man-made glass with cobalt and metal flecks
man-made glass
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
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