Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
Agate
Silicon Dioxide (SiO2)
Chert Pebble with Quartz Veining
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Agate
Silicon Dioxide / Cryptocrystalline Quartz (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Chalcedony
Silicon dioxide (SiO2) - Microcrystalline quartz
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
Chert (with Manganese Oxide coating)
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Chert with Iron Oxide Staining
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Script Jasper
Silicon Dioxide (SiO2) with impurities
Agate
Cryptocrystalline Quartz (SiO2)
Chert (Limestone-based)
Silicon Dioxide (SiO2)
Agate (specifically Lace Agate or Banded Agate)
Silicon Dioxide (SiO2)
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
Yellow Quartzite (or Yellow Chalcedony Pebble)
Silicon Dioxide (SiO2)
Chert (specifically a variety like Flint or River Jasper with Iron Oxidation)
Microcrystalline Quartz (SiO2)
Agate
Cryptocrystalline Quartz (SiO2)
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
Red Jasper with Quartz Vein
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
Jasper and Quartzite Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Brecciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
Agate
Silicon dioxide (SiO2) - variety Chalcedony
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Agate Geode
Silicon Dioxide (SiO2) - variety Chalcedony/Quartz
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
Red Jasper (with Quartz inclusions)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Yellow Quartz
SiO2 (Silicon Dioxide)
Banded Agate (River Stone)
Agate (Silicon Dioxide - SiO2)
Botryoidal Chalcedony (Agate/Carnelian)
Chalcedony (SiO2)
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
Dyed Blue Agate
Cryptocrystalline Quartz (SiO2)