Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Category
Man Made Object (Metalwork)
Browse man made object (metalwork) specimens identified by the Rock Identifier community.
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Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
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
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
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
mineral
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
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
sedimentary (imitation)
Hematite
Iron(III) oxide (Fe2O3)
mineral
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Carborundum
Silicon Carbide (SiC)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Unidentified Small Rock
Unknown
undetermined
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Polished brown stone, likely smoky quartz or jasper
Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing
mineral
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
mineral
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Synthetic Glass
Sea Glass
Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature
mineral
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Smelter Slag
Anthropogenic Silicate Slag
igneous
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
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)
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral