Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
Category
Browse mineral (variety of chalcedony) specimens identified by the Rock Identifier community.
Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Carnelian
SiO2 (Quartz variety)
Green Agate
Silicon dioxide (SiO₂)
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Tumbled red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
Jasper Pendant
Chalcedony (Quartz) - SiO2
Amethyst Geode (Thunderegg)
Silicon Dioxide (SiO2) - Quartz Variety: Amethyst
Jasper
Jasper (Silicon Dioxide, SiO2)
Chalcedony (Dyed Agate and Citrine-style Quartz)
Silicon Dioxide (SiO2)
Jasper (specifically Picture Jasper or Landscape Jasper)
Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz
Jasper
Silicon dioxide (SiO2)
Agate
Silicon Dioxide (SiO2), microcrystalline variety of quartz
Black Onyx and Verdigris Copper Jewelry
Chalcedony (SiO2) with Copper Patina
Jasper with Agate Inclusions
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
Yellow Jasper
Chalcedony (Silicon Dioxide, SiO2)
Tumbled brown chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
Banded Agate (variety of Chalcedony)
Agate (SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Tumbled carnelian (probable)
Cryptocrystalline silica, mainly chalcedony (SiO₂), colored orange-red by iron oxides
Likely weathered gray flint/chert pebble
Microcrystalline quartz (SiO₂), commonly with chalcedony and minor impurities
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Jasper with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite/Goethite
Jasper pebble
Silicon Dioxide (SiO2) with impurities
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
Jasper
Silicon dioxide (SiO2)
Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
Yellow Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
Jasper
Silicon dioxide (SiO2)
Polished Jasper (Mushroom Carving)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Jasper
Silicon dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)