Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Category
Synthetic Glass (Man Made)
Browse synthetic glass (man made) specimens identified by the Rock Identifier community.
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Silicon
Element Si
mineral
Silicon Carbide (Carborundum)
Silicon Carbide, SiC
mineral
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Likely citrine or yellow glass imitation in a silver-tone bracelet
Citrine: quartz, SiO₂; exact material cannot be confirmed visually
gemstone
Rough Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (70% or more SiO2)
igneous
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
White seed-bead gemstone strand, likely freshwater pearl or shell pearl
Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image
gemstone
Tourmalinated Quartz
Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Clear quartz sphere
Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz
mineral
Colorless faceted gemstone, likely cubic zirconia
Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond
gemstone
White Sapphire
Corundum (Al2O3)
mineral
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
mineral (synthetic glass)
Yellow Sapphire
Corundum (Al2O3:Fe)
gemstone
Parti Sapphire
Corundum (Al2O3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Yellow-orange faceted gemstone, likely citrine or yellow topaz
Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂
gemstone
Sea Glass (Cobalt Blue)
Amorphous Silica (Glass with Cobalt additives)
Anthropogenic specimen (man-made)
Sapphire
Corundum (Al2O3)
mineral
Painted Rock
Weathered Sedimentary Rock (Painted)
sedimentary
Painted River Rock
Painted Quartzite or Smooth Siltstone
sedimentary
Green Fluorite (likely synthetic or heat-treated for jewelry)
Calcium Fluoride (CaF2)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
mineral
Plastic Building Toy (Lego-style piece)
Acrylonitrile Butadiene Styrene (ABS)
not a rock/mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Sea Glass
Amorphous Silica (Glass) SiO2
Mineraloid (Man-made origin)
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)
metamorphic
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Pumice
Pumice (Vitreous volcanic rock)
igneous
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Strawberry Quartz (or Rose Quartz / Cherry Quartz)
Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions
mineral
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material