Limestone
Calcareous sedimentary rock (CaCO3)
Category
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Limestone
Calcareous sedimentary rock (CaCO3)
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
Yellow Sapphire (Raw)
Corundum (Al2O3)
Chert
Sedimentary cryptocrystalline quartz (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
Sea Shell (Fighting Conch Fragment)
Calcium Carbonate (CaCO3) - Strombus alatus fragment
River Pebbles (Chert and Quartzite)
Sedimentary Clastic Rock (Silica-rich)
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Dyed and polished agate cabochon
Microcrystalline quartz (chalcedony), SiO₂; likely colored or composite agate
Sea Glass
Amorphous Silicon Dioxide (SiO2)
Crackle Glass (Simulated Gemstone)
Amorphous Solid (SiO2)
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
Goldstone (Brown)
Aventurine glass
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
Tumbled brown chalcedony or jasper
Microcrystalline quartz, SiO₂; possibly iron-bearing jasper
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (SiO2)
Chert
Microcrystalline quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
Chert
Microcrystalline Silicon Dioxide (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Flint (or Chert)
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Silicon dioxide (SiO2)