Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
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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Green Kyanite
Kyanite (Al2SiO5)
mineral
Obsidian with Cristobalite
Volcanic Glass (Amorphous Silicon Dioxide) with Cristobalite inclusions
igneous
Gypsum Wallboard (Drywall)
Hydrous calcium sulfate (CaSO4·2H2O)
sedimentary (processed mineral product)
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Snowflake Obsidian (Tumbled)
Obsidian with Cristobalite inclusions
igneous
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
mineral
N/A (Non-Geological Object)
N/A
Botryoidal aragonite (cave or hydrothermal aragonite)
Aragonite, orthorhombic CaCO₃; likely associated with calcite and minor matrix minerals
mineral
Microcline Feldspar
KAlSi3O8
mineral
Aragonite (Sputnik habit)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
K2 Jasper (K2 Granite)
Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)
igneous
Snowflake Obsidian
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Banded aragonite (often sold as banded calcite or “onyx marble”)
Aragonite, CaCO₃; commonly an aragonite–calcite carbonate aggregate
mineral
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Aragonite (Onyx Marble)
Calcium Carbonate (CaCO3), Orthorhombic crystal system
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
K2 Jasper (K2 Granite)
Azurite in Granite (Biotite Granite with Azurite inclusions)
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
igneous
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Amber
Succinite
mineral
Snowflake Obsidian
Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)
igneous
Snowflake Obsidian
Volcanic Glass (spherulitic Obsidian) - SiO2 (with Cristobalite inclusions)
igneous
Snowflake Obsidian
Volcanic glass containing Cristobalite (SiO2)
igneous
Aragonite cluster
Aragonite, CaCO₃ (orthorhombic polymorph of calcite)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Aragonite
Aragonite (Carbonate mineral), CaCO3
mineral
Blue-gray chalcedony (likely agate/jasper fragment)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Kaolinite (China Clay / Chalky Claystone)
Al2Si2O5(OH)4
mineral
White aragonite (coralloid/botryoidal aragonite)
Aragonite, CaCO₃; orthorhombic polymorph of calcite
mineral
Diamond (as set in a gold ring)
Carbon (C)
mineral