Chert (Flint)
Chert (SiO2)
sedimentary
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
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Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Petrified Wood
Silicified wood (Quartz / Chalcedonized wood, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Mineral (Variety of Chalcedony)
Amber
Succinite
Organic mineraloid
Liesegang Ring Siltstone
Siltstone with iron oxide Liesegang bands
sedimentary
Septarian Nodule or Concretion
Calcareous concretion with argillaceous and sideritic components
sedimentary
Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint or Dark Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Limestone (Fossiliferous)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Chert (and Limestone Pebbles)
Silicon Dioxide (SiO2) / Sedimentary Microcrystalline Quartz
sedimentary
Dyed Pink Quartzite (Jadeite Simulant)
Silicon Dioxide (SiO2) with organic dye
metamorphic
Chert (Chert Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone or Shale
Biomicrite (if limestone) or Fossiliferous Shale
sedimentary
Petrified Wood
Silicified wood / Xylopal
fossil
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Shale with Plant Fossils / Carbonaceous Shale
Laminated Mudrock (Siliciclastic)
sedimentary
Weathered coal-bearing sedimentary rock (likely shale or mudstone with coal fragments)
Carbonaceous shale/mudstone; predominantly clay minerals, quartz, and organic carbon
sedimentary
Graphite-rich metamorphic rock (probable graphite schist)
Graphite schist; predominantly graphite (C) with quartz and mica
metamorphic
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Fossilized Coral (Petoskey Stone or Rugose Coral)
Antophyllum (Hexagonaria) or Scleractinia (CaCO3)
sedimentary
Chert (Nodule)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)
fossil
Chert Concretion
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3)
sedimentary
Fossilized tooth fragment, possibly a mammalian tooth
Indeterminate fossil tooth; enamel and dentine, taxon not identifiable from this fragment
fossil
Black Beach Pebble (Basalt / Slate Pebble)
Rounded Fine-Grained Clastic / Igneous Rock Pebble
sedimentary
Banded Chert (or River Jasper)
Microcrystalline Quartz (SiO2) with iron oxide impurities
sedimentary