Beaded gemstone bracelet
Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components
gemstone
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
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Green Aventurine
Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)
metamorphic
Obsidian
Volcanic glass (SiO2)
igneous
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz)
sedimentary
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Weathered chert or chalcedony nodule
Microcrystalline quartz (SiO₂), possibly silicified limestone or agate-like chalcedony
sedimentary
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Pumice
Pumice (Vitreous volcanic rock)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Tumbled chert or jasper pebble
Microcrystalline quartz (SiO₂), likely chert/jasper
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint)
Chert (SiO2)
sedimentary
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Chert
Silicon dioxide (SiO2)
Sedimentary
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Synthetic/Man-made Material
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Antropogenic rock (Man-made)
Small metallic-looking mineral/rock fragment
Indeterminate from image; possibly galena, hematite, or metallic slag
mineral
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Chert / Jasper
Silicon Dioxide (SiO₂)
sedimentary
Green iridescent glass cabochon or synthetic gemstone
Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone
gemstone
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Antropogenic (Man-made material)
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary