Chalcedony
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
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Honey-colored chalcedony (rough agate/chert)
Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide staining
mineral
Chert (Pink/Red variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Chert (Chert Nodule in Limestone)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Blue Chalcedony
Chalcedony (Silicon Dioxide, SiO2)
mineral
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Jasper (Green Jasper/Chert)
Silicon Dioxide (SiO2)
sedimentary
Leopard Skin Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
mineral
Tumbled brown quartz/chalcedony (probable)
Quartz, SiO₂; possibly brown chalcedony or jasper
mineral
Agate
Cryptocrystalline quartz (SiO2)
Mineral
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Onyx
Chalcedony (SiO2) with parallel banding
mineral
Flint
Silicon dioxide (Microcrystalline Quartz / Chert)
sedimentary
Banded Agate
Agate (chalcedony variety of Silicon Dioxide, SiO2)
mineral
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chrysoprase-bearing Quartz
Silicon Dioxide with Nickel Inclusions (SiO2)
mineral
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
sedimentary
Quartz Pebble (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Opal variant or Quartz)
Silicon Dioxide (SiO2)
mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Mineral
Mookaite Jasper
Siliceous sedimentary rock (variety of Jasper/Chert)
Sedimentary Rock
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Hematite) inclusions
sedimentary
Polished Jasper (Mushroom Carving)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chrysoprase
Silicon dioxide (SiO2) with nickel impurities
mineral
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Polished orange agate or chalcedony
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate
mineral
Yellow Chalcedony
Silicon Dioxide (SiO2)
mineral
Agate (specifically Botswana or Lake Superior style chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
mineral