Slag (Industrial Glass/Glassy Rock)
Anthropogenic Vitreous Material
igneous
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
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Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Likely blue glass or synthetic gemstone jewelry
Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass
gemstone
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
mineraloid / industrial byproduct
Black Onyx
Chalcedony (SiO2)
gemstone
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
Diamond
Native Carbon (C)
mineral
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Blue Obsidian
Volcanic Glass (SiO2 with inclusions)
igneous
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Hematite
Iron(III) oxide (Fe2O3)
mineral
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Carborundum
Silicon Carbide (SiC)
mineral
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
mineral
Sea Glass
Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature
mineral
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral