Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Category
Man Made Alloy (Metallic)
Browse man made alloy (metallic) specimens identified by the Rock Identifier community.
Learn about Man Made Alloy (Metallic) in the encyclopedia
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Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Blue chalcedony cabochon (probable)
Chalcedony, a cryptocrystalline variety of quartz; silicon dioxide, SiO₂
gemstone
Cubic Zirconia (CZ) in Gold-Plated Setting
Cubic Zirconium Dioxide (ZrO2)
mineral
Copper-bearing rock, possibly native copper in a weathered matrix
Likely copper minerals such as malachite (Cu₂CO₃(OH)₂) in an iron-rich host; exact identification is uncertain from the image
mineral
Yellow Sapphire (Raw)
Corundum (Al2O3)
mineral
Chert (possibly a worked stone flake)
Microcrystalline quartz, SiO₂
sedimentary
Sea Glass
Amorphous Silicon Dioxide (SiO2)
Mineral/Man-made
Crackle Glass (Simulated Gemstone)
Amorphous Solid (SiO2)
man-made glass
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
metamorphic (man-made)
Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
mineraloid (man-made)
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Garnet-set butterfly brooch
Likely almandine or pyrope garnet, iron–aluminum silicate (Fe₃Al₂Si₃O₁₂ or Mg₃Al₂Si₃O₁₂)
gemstone
Beaded mineral/crystal jewelry (likely turquoise and coral accents)
Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials
gemstone
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Diamond
Carbon (C)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Black Jasper
Black Jasper (Silicate mineral - SiO2)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Amethyst and aquamarine gemstone bracelet
Amethyst: purple quartz, SiO₂; blue beads likely aquamarine/blue quartz, with possible metallic spacer beads
gemstone
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
mineral
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Diamond (Colorless/White)
Carbon (C)
mineral
Clear faceted gemstone in a gold-colored setting
Likely colorless quartz (rock crystal) or synthetic cubic zirconia; visual identification is inconclusive
gemstone
Flint (chert)
Microcrystalline quartz (SiO₂), commonly called chert or flint
sedimentary
Clear-stone silver-tone teardrop earring
The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.
gemstone
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
mineral
Corundum (Pink Sapphire / Ruby)
Al2O3 (Aluminum Oxide)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2(SiO3)6) with chromium/vanadium traces
mineral