Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Synthetic Glass (Man Made)
Browse synthetic glass (man made) specimens identified by the Rock Identifier community.
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
man-made alloy (metallic)
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Plastic Building Toy (Lego-style piece)
Acrylonitrile Butadiene Styrene (ABS)
not a rock/mineral
Green Fluorite (likely synthetic or heat-treated for jewelry)
Calcium Fluoride (CaF2)
mineral
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
mineral (synthetic glass)
Obsidian
Volcanic glass
igneous
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Native Silver
Silver (elemental Ag)
mineral
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
mineral
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide)
igneous
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Chert (specifically Flint)
Chert (SiO2)
sedimentary
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various additives
Man-made material (Anthropogenic 'mineraloid')
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO₂)
sedimentary
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Lapis Lazuli
Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral