Quartz Geode with Calcite
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
Category
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
Quartz Geode with Calcite
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Inclusions
Chert (Green Chert or Jasper)
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (SiO2)
Chert (Flint) Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (River Pebble with Liesegang Rings)
Microcrystalline Silicon Dioxide (SiO2)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead artifact)
Chert (Cryptocrystalline Silica, SiO2)
Chert
Microcrystalline Quartz (SiO2)
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Chert (Chalcedony)
Silicon Dioxide (SiO2)
Fairy Stone (Menilite Concretion)
Carbonate-rich concretion (often Siderite or Calcite in Clay)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Dyed Agate
Microcrystalline Quartz (SiO2) with artificial pigment
Banded Iron Formation (BIF) / Ironstone Conglomerate
Ironstone (Hematite/Goethite rich sedimentary rock)
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
Limonite or Ironstone Concretion
FeO(OH)·nH₂O (Hydrated iron oxide-hydroxide)
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
Optical Calcite
Calcium Carbonate (CaCO3)
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)
Banded Jasper with Hematite or Quartz
Silicon Dioxide (SiO2) with impurities
Honey Calcite
Calcium Carbonate (CaCO3)
White Marble
Metamorphosed Limestone (principally CaCO3)
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
White Quartz
Silicon Dioxide (SiO2)
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
Red Jasper Pebble
Opaque microcrystalline Quartz (SiO2) with Iron Oxide
Goethite/Hematite Nodule
Goethite (FeO(OH)) and Hematite (Fe2O3)
Limestone
Calcium Carbonate (CaCO3)
Banded Chert
Silicon Dioxide (SiO2)
Chert Pebble with Quartz Vein
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Limestone Pebble
Calcium Carbonate (CaCO3)
Flint Nodule
Chert (Cryptocrystalline Quartz, SiO2)
Chert
Chert (SiO2)
Chert (Polished/Tumbled)
Silicon Dioxide (SiO2)