Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Category
Organic (Non Rock)
Browse organic (non rock) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Coprolite
Coprolite (fossilized feces)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Dinosaur Bone (Gembone)
Silicified Dinosaur Bone (SiO2 replacing organic tissue)
sedimentary
Quartzite
Metamorphic Quartzite
metamorphic
Amber (Tumbled/Polished)
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Moss Agate
Silicon dioxide (SiO2) with mineral inclusions
Mineral
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Limestone
Calcium carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint in this context)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Basalt River Pebble)
Silicon Dioxide (SiO2) or Microcrystalline Quartz
sedimentary
Fossilized Bone
Vertebrate Fossil Fragment (Calcium Phosphate / Hydroxyapatite)
fossil
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper influence)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Chert
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Chert Nodule (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert with Weathered Rind (Flint/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Chert
Silicon dioxide (SiO2) with impurities
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Red Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Quartzite and Chert
Silicon Dioxide (SiO2)
metamorphic and sedimentary