Snowflake Obsidian
Volcanic Glass (SiO2 with Cristobalite inclusions)
igneous
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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Opalite
Man-made glass (traditionally simulated Opal)
mineral
Aragonite
Aragonite (CaCO3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
metamorphic
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Blue aragonite (probable)
Aragonite, CaCO₃; blue color likely from copper-bearing impurities
mineral
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Kaolinite (China Clay / Chalky Claystone)
Al2Si2O5(OH)4
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Kyanite (Blue and Green varieties)
Kyanite (Al₂SiO₅)
mineral
Aragonite Star Cluster
Aragonite (Sputnik habit) - CaesarCO3
mineral
Snowflake Obsidian
Volcanic Glass with Spherulite Inclusions (70–75% SiO2)
igneous
Chiastolite (Andalusite)
Al2SiO5
metamorphic
Silicon Carbide (Carborundum)
Silicon Carbide, SiC
mineral
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2)
igneous
Kyanite
Kyanite (Al2SiO5)
mineral
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Graphite
Carbon (C)
mineral
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
The user-provided image does not contain a rock or mineral specimen
N/A
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Mica (Muscovite)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone
Arenite
sedimentary
Blue Agate (Tumbled and Dyed)
Silicon Dioxide (SiO2) with likely organic dyes
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Snowflake Obsidian
Obsidian with Cristobalite inclusions (mostly amorphous SiO2)
igneous
Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)
Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)
gemstone
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Aragonite Star Cluster (Cross-section)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Aragonite (Botryoidal/Coralloidal variety)
Aragonite (CaCO3)
mineral
Sandstone
Arenite (primarily Quartz chemical formula SiO2)
sedimentary
Amber
Succinite (fossilized tree resin)
fossil