Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
Category
Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
Quartz Geode with Calcite
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
Agate (Geode nodule)
Cryptocrystalline Quartz (SiO2)
Chert (Banded)
Silicon Dioxide (SiO2)
Banded Iron Formation (BIF) / Ironstone Conglomerate
Ironstone (Hematite/Goethite rich sedimentary rock)
Banded Chert
Silicon Dioxide (SiO2)
Possible iron-rich chert or slag-like rock
Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
Blue Agate (likely dyed)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Chert (Flint / Chalcedony pebble)
Silicon Dioxide (SiO2)
Chert / Flint
Cryptocrystalline quartz (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Quartz
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Jasper Pebble
SiO2 (Microcrystalline Quartz)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
Jasper or Red Quartzite
SiO2 (Silicon Dioxide with iron oxide impurities)
Quartz
Silicon Dioxide (SiO2)
Limonite / Iron Oxide Concretion
FeO(OH)·nH2O (Hydrated iron oxide)
Quartz
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2)
Geode (Unopened)
Silica-rich Concretion (SiO2)
Flint
Chert (SiO2)
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Banded Chalcedony (Agate)
Silicon Dioxide (SiO2)
Chalcedony (Agate/Chert)
Chalcedony (Silicon Dioxide, SiO2)
Carnelian (Red Agate)
Chalcedony (SiO2 with Iron Oxide impurities)
Quartz
Silicon dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Red Jasper or Ironstone concretion
SiO2 or Fe2O3
Orange Calcite
Calcium Carbonate (CaCO3)
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock