Travertine (Tufa)
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Category
Sedimentary (Biogenic)
Browse sedimentary (biogenic) specimens identified by the Rock Identifier community.
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Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Limestone
Calcareous Sedimentary Rock (CaCO3)
sedimentary
Chert (Limestone-hosted Pebble)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Shale
Shale (clastic sedimentary rock)
Sedimentary
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Limestone (with Iron-Oxide staining)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Oolitic Limestone
Oolite (Sedimentary Calcium Carbonate)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Chert (specifically a stream-worn Chert Nodule)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Tabulate Coral
Favosites (Honeycomb Coral)
fossil
Banded Chert (River Stone)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (Banded)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Stem Fossil
Class Crinoidea (Sea Lilies)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Conglomerate
Clastic Sedimentary Conglomerate (SiO2 based clasts in matrix)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Bauxite (Concretionary)
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone (with potential Concretion or Fossil fragment)
Arenite (primarily SiO2)
sedimentary
Chert (and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
mineral
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various inclusions)
sedimentary
Jasper Pendant
Silicon dioxide (SiO2) with impurities
Mineral/Sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Ammonite Fossil
Ammonitida (Extinct subclass of Cephalopoda)
sedimentary
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary