Coquina
Biogenic Limestone (Coquina)
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Coquina
Biogenic Limestone (Coquina)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Coquina
Bioclastic Limestone (Calcium Carbonate, CaCO3)
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
Sandstone
Clastic Sedimentary Rock
Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
Pyrite
Iron Sulfide (FeS2)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
Pink calcite (likely)
Calcite — calcium carbonate, CaCO₃
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)
Chert (Flint)
Chert (Cryptocrystalline Silica, SiO2)
Chert (Brown Variety)
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2)
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
Sandstone
Arenite (SiO2 primarily)
Yellow Chert (Chalcedony)
Microcrystalline Quartz (SiO2)
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
Chert
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
Chert (Iron-stained)
Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)
Chalk
Calcium Carbonate (CaCO3)
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
Chert (and associated river cobbles)
Silicon dioxide (SiO2)
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')
Calcite (Calcium Carbonate, CaCO3)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Pyrite
Iron Sulfide (FeS2)
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
Chert
Sedimentary cryptocrystalline quartz (SiO2)
White Marble
Recrystallized Calcite Rock (CaCO3)
Pyrite in Matrix
Iron Sulfide (FeS2)
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)