Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
mineral (silicate-replaced organic material)
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Green Jasper (with Quartz veining)
Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2
sedimentary
Amber
Succinite (fossilized resin, C10H16O)
mineral
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Chert (Iron-stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Shungite
Non-crystalline carbonoid (Shungite)
metamorphic
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Amber
Succinite
Mineraloid
Yellow Chert
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Amber
Succinite
Organic mineraloid
Fossiliferous Rock (likely Dinosaur Fossil in Matrix)
Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)
sedimentary
Chert (Tan/Yellow variety)
Microcrystalline Quartz (SiO2)
sedimentary
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
mineral
Turquoise and Red Coral
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)
mineral
Drupa Quartz (Sparkly Drusy Quartz on Matrix)
Crystalline Silicon Dioxide (SiO2) on host rock
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Shungite
Non-crystalline carbon (similar to anthracite coal or meta-anthracite)
metamorphic
Dendritic Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
sedimentary
Chert (containing Iron Oxide spots)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite Geode
Iron Disulfide (FeS2)
mineral
Amber
Succinite (C10H16O)
mineraloid
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper Agate
Silicon dioxide (SiO2)
mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Chert (Beach Pebble)
Silicon Dioxide (SiO2)
sedimentary