Graphite
Graphite (Carbon, C)
mineral
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Synthetic Paper And Ink Polymorph) in the encyclopedia
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Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Quartz with Schist/Mica Inclusions
Crystalline Silicon Dioxide (SiO2) with Phyllosilicates
metamorphic
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Mineral
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Diamond (or Cubic Zirconia simulant)
Carbon (C) / Zirconium Dioxide (ZrO2)
gemstone
Pink/red faceted gemstone, likely synthetic ruby or pink sapphire
Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material
gemstone
Sandstone (Lithic Sandstone / Greywacke)
Sandstone (SiO2 rich clastic sedimentary rock)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Kaolinite (China Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Sandstone (River Cobble)
Sandstone (composed predominantly of SiO2 - Quartz)
sedimentary
Graphite
Graphite (Native Carbon, C)
metamorphic
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Translucent yellow-orange mineral specimen, possibly amber or citrine
Uncertain; amber is fossilized tree resin (organic), while citrine is quartz, SiO₂
mineral
Silicon Carbide (Carborundum)
Moissanite (SiC)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Slate
Slate (Foliated metamorphic rock consisting mainly of quartz and muscovite or illite)
metamorphic
Raw ruby (corundum)
Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Amethyst quartz cluster
Quartz, SiO₂; purple variety amethyst
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Cubic Zirconia (CZ)
Zirconium dioxide (ZrO2)
mineral
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Barite
Barium sulfate (BaSO4)
mineral
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Weathered Coastal Boulder)
Arenite (composed primarily of SiO2)
sedimentary
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Goldstone
Aventurine Glass (Man-made)
mineral
Botryoidal Aragonite (Cave Popcorn)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Calcite
Calcium Carbonate (CaCO3)
mineral