Jasper
Silicon dioxide (SiO2)
sedimentary
Category
Organic (Sedimentary Context)
Browse organic (sedimentary context) specimens identified by the Rock Identifier community.
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Chert (Flint/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper with Quartz
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper/Brown Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert Nodules
Chert (SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Fossilized Tiger Shark Tooth
Galeocerdo cuvier (fossilized hydroxylapatite)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Chert (Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
sedimentary
Chert (Flint/Jasper)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Petrified Wood Agate
Silicified Wood (primarily SiO2)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
sedimentary (matrix) / mineral (inclusion)
Black Jasper (Black Onyx substitute)
Silicon Dioxide (SiO2) with carbonaceous impurities
sedimentary (microcrystalline quartz)
Coal (Bituminous)
Organic sedimentary rock primarily consisting of carbon (C)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Likely fossil shell fragment
Indeterminate mollusk fossil; possibly a gastropod or bivalve in limestone
fossil
Tumbled brown quartz/chert pebble
Microcrystalline quartz (SiO₂), possibly chert or jasper
mineral
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Chert (Septarian Nodules-like)
Silicon dioxide (SiO2)
sedimentary
Mosasaur Tooth Fossil
Mosasaurus sp.
fossil
Pyrite in Limestone
Iron Sulfide (FeS2) in Calcium Carbonate (CaCO3)
mineral
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert (Arrowhead Preform)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary