Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
Category
Browse sedimentary specimens identified by the Rock Identifier community.
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Carnelian Agate
Chalcedony (SiO2 with Iron Oxide impurities)
Pyrite in Matrix
Iron Sulfide (FeS2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Limonite (Iron Ore)
Limonite (unstructured hydrated iron(III) oxide-hydroxides, often FeO(OH)·nH2O)
Yellow Jasper
Silicon Dioxide (SiO2) with iron impurities
Quartz / Common Agate
Silicon Dioxide (SiO2)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Carnelian Agate
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
Brown Agate
Silicon Dioxide (SiO2)
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O
Pyrite
Iron Sulfide (FeS2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Banded Agate
Agate (Silicon Dioxide, SiO2)
Raw Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
Pebble
Clast (specifically a granule or small pebble)
Chert (and Chert Flake)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Red Jasper (Skull Carving)
Jasper (Silicon Dioxide, SiO2 plus Iron Oxide inclusions)
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Chert Geode with Quartz Druzy
Microcrystalline Quartz (SiO2) with macrocrystalline Quartz
Chert (specifically Flint or Common Chert)
Chert (Cryptocrystalline Silica, SiO2)
Chert and Chalcedony
Cryptocrystalline Quartz (SiO2)
Chert (specifically Red Chert/Jasper nodule)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)