Moqui Marble (Shaman Stone)
Iron Oxide Concretion (composed primarily of Quartz sand with Hematite/Goethite shell)
sedimentary
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
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Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Coral
Scleractinian Anthozoa (Fossilized Calcium Carbonate, CaCO3)
sedimentary
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Ironstone Concretion
Ironstone (Limonite/Goethite Concretion)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Agate
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Petrified Wood
Silicified wood (Quartz variant, SiO2)
sedimentary
Chert (Jasper/Black Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Chert (White Variety)
Microcrystalline Silica (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline context of Quartz (SiO2)
sedimentary
Limestone (Weathered)
Sedimentary carbonate rock, primarily calcium carbonate (CaCO3)
sedimentary
Calcareous Tufa
Tufa (Calcium Carbonate, CaCO3)
sedimentary
Silver Nugget
Native Silver (Ag)
mineral
Chert (and/or River Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Tufa
Calcareous Tufa (Calcium Carbonate, CaCO3)
sedimentary
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Coprolite
Fossilized Feces
sedimentary