Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
mineral
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
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Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fossil fish slab
Fossilized fish remains, likely a laminated shale-hosted vertebrate fossil; exact taxon is indeterminate from the image
fossil
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Lava Stone and Chakra Beads
Basalt (with various mineral/synthetic beads)
igneous
Amber
Succinite (fossilized resin, C10H16O)
mineral
Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Barite
Barium sulfate (BaSO4)
mineral
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Sandstone (with biological crust)
Arenite (SiO2 based)
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Tumbled amber-colored chalcedony
Chalcedony (microcrystalline quartz, SiO₂), possibly yellow jasper or resinous amber-colored agate
mineral
Faceted transparent gemstone, likely glass or cubic zirconia
Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation
gemstone
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Graphite
Graphite (Carbon, C)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Loose faceted colorless gemstones, likely quartz or glass-like mineral chips
Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass
gemstone
Molybdenite in Quartz
Molybdenite (MoS2) with Quartz (SiO2)
mineral
Garden Quartz (Lodalite)
Silicon Dioxide with various mineral inclusions (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide Cement
sedimentary
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Igneous
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Pyrite
Iron Disulfide (FeS2)
mineral
Ferruginous Sandstone
Arenite with limonite/goethite cement
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Amber
Succinite (organic hydrocarbon)
mineraloid
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Biotite on Quartz
Biotite Mica (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Gemstone Ring
Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)
gemstone