Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
Category
Browse anthropogenic sedimentary style organic solid specimens identified by the Rock Identifier community.
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Pyrite Concretion
Iron Sulfide (FeS2) in Sedimentary Matrix
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
River Cobble (Sandstone)
Arenite (primarily SiO2)
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
Quartzite river stone
Quartzite (SiO2)
Amber
Succinate (Fossilized Resin)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (with Limestone/Carbonate matrix)
Sedimentary cryptocrystalline silica (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Yellow Chert (River Stone)
Chert (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert Nodule (with Geode cavity)
Cryptocrystalline Quartz (SiO2)
Shungite
Shungite (Non-crystalline carbon, C)
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Chert / Flint
Silicon dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Black Jasper
Silicon Dioxide (SiO2) with impurities
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Flint (Chert)
Cryptocrystalline Quartz (SiO2)
Chert (specifically White Chert or Flint)
Microcrystalline or cryptocrystalline quartz (SiO2)
Jasper
Silicon dioxide (SiO2) with impurities
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Chert / Chalcedony
Silicon Dioxide (SiO2)
Chert (Arrowhead Debitage or Spall)
Silicon Dioxide (SiO₂)
Chert (specifically Flint or Dark Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Yellow Jasper (Chert)
Silicon Dioxide (SiO2) with iron inclusions
Chert
Chert (Microcrystalline Quartz, SiO2)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
Jasper
Silicon dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Chert (Yellow Jasper variant)
Microcrystalline quartz (SiO2)
Red Jasper
Quartz (Silicon Dioxide) with Hematite inclusions, SiO2
Chert (and Flint)
Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz