Dalmatian Jasper
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is microcrystalline quartz) specimens identified by the Rock Identifier community.
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Agate
Chalcedony (SiO2) with impurities
sedimentary
Dendritic Agate (Montana Moss Agate)
Silicon Dioxide (SiO2) - Chalcedony with Manganese/Iron inclusions
mineral
Tumbled brown jasper
Microcrystalline quartz/chalcedony (SiO₂), commonly iron-oxide stained
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite inclusions
sedimentary
Polished red jasper (likely brecciated jasper)
Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides
mineral
Brown Jasper
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silica with Iron Oxide inclusions), SiO2
sedimentary
Red Jasper
Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)
sedimentary
Dyed agate (likely dyed chalcedony)
Microcrystalline quartz, SiO₂ (chalcedony/agate)
gemstone
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper River Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Dyed Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Tumbled chalcedony (likely brown agate/jasper)
Microcrystalline quartz, SiO₂; potentially iron-stained chalcedony or jasper
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Mineral
Agate
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Quartz (Chert/Chalcedony flake)
Silicon Dioxide (SiO2)
mineral
Chert (Tripolitic Chert / Flint Nodules)
Microcrystalline Quartz (SiO2)
sedimentary
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz
mineral
Polished Jasper Sphere
Silicon Dioxide (SiO2) with iron and other mineral inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Polished red jasper or mahogany obsidian (likely jasper)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Orbicular jasper (likely ocean jasper)
Silica-rich microcrystalline quartz/chalcedony with iron-oxide and other mineral inclusions; commonly classified as orbicular jasper
mineral
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)
sedimentary
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Tumbled pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), pink variety commonly called rose quartz
mineral
Jasper (likely red/brown jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Jasper
Jasper (Silica/Quartz) - SiO2
mineral
Tourmalinated Quartz
Silicon Dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
mineral
Chert (flint), likely with iron-stained weathering rind
Microcrystalline quartz/chalcedony (SiO₂)
sedimentary
Polished carnelian/chalcedony pebble
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony
gemstone
Tumbled carnelian (orange chalcedony)
Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides
gemstone
Chert
Chert (SiO2)
sedimentary
Chrysoprase
Silicon dioxide (SiO2) with nickel impurities
mineral