Rock Identifier

Category

Mineral (Chalcedony)

Browse mineral (chalcedony) specimens identified by the Rock Identifier community.

Learn about Mineral (Chalcedony) in the encyclopedia

Chalcedony

Blue Chalcedony

Blue Chalcedony

Chrome Chalcedony

Chrome Chalcedony

Gem Silica

Plume Agate

Landscape Agate

Landscape Agate

Chrysoprase

Sard

Prase

Glauconite

Sagenite Agate

Grape Agate

Jasper with Quartz (Silicon dioxide (SiO2)) — mineral

Jasper with Quartz

Silicon dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — mineral

Jasper

Silicon dioxide (SiO2)

Agate (or Quartz with Agate banding) (Silicon dioxide (SiO2)) — Mineral

Agate (or Quartz with Agate banding)

Silicon dioxide (SiO2)

Agate (SiO2) — Mineral

Agate

SiO2

Yellow Jasper (Silicon dioxide, SiO2) — mineral

Yellow Jasper

Silicon dioxide, SiO2

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished agate (likely moss or plume agate) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Polished agate (likely moss or plume agate)

Microcrystalline quartz, SiO₂ (chalcedony)

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Geode-like quartz vein in banded chalcedony (Quartz and chalcedony (SiO₂), possibly agate) — mineral

Geode-like quartz vein in banded chalcedony

Quartz and chalcedony (SiO₂), possibly agate

Agate (Cryptocrystalline quartz, Chalcedony (SiO2)) — mineral

Agate

Cryptocrystalline quartz, Chalcedony (SiO2)

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — mineral

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

Polished banded agate (Banded chalcedony, microcrystalline quartz (SiO₂)) — mineral

Polished banded agate

Banded chalcedony, microcrystalline quartz (SiO₂)

Tumbled carnelian and related stones (Carnelian: orange-red chalcedony, microcrystalline SiO₂; the dark central piece may be hematite- or jasper-rich material) — mineral

Tumbled carnelian and related stones

Carnelian: orange-red chalcedony, microcrystalline SiO₂; the dark central piece may be hematite- or jasper-rich material

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite inclusions

Banded Jasper (Silicon Dioxide with Iron Oxide impurities (SiO2)) — sedimentary

Banded Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2)

Quartz (Chalcedony / Rough Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chalcedony / Rough Quartz Pebble)

Silicon Dioxide (SiO2)

Tumbled carnelian (likely) (Carnelian, a chalcedony variety of microcrystalline quartz (SiO₂), colored mainly by iron oxides) — gemstone

Tumbled carnelian (likely)

Carnelian, a chalcedony variety of microcrystalline quartz (SiO₂), colored mainly by iron oxides

Agate (Chalcedony (Microcrystalline Quartz) - SiO2) — Mineral

Agate

Chalcedony (Microcrystalline Quartz) - SiO2

Blue chalcedony (likely dyed or coated) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

Agate (Chalcedony (Microcrystalline Quartz) - SiO2) — Mineral

Agate

Chalcedony (Microcrystalline Quartz) - SiO2

Amygdaloidal Basalt (Amygdaloidal Basalt (containing quartz/agate or zeolite fill)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (containing quartz/agate or zeolite fill)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished banded calcite (often sold as “onyx marble” or Mexican onyx) (Banded calcite, CaCO₃ (sometimes aragonite); decorative “onyx marble” is not true quartz onyx) — sedimentary

Polished banded calcite (often sold as “onyx marble” or Mexican onyx)

Banded calcite, CaCO₃ (sometimes aragonite); decorative “onyx marble” is not true quartz onyx

Rounded quartz-rich pebble (Likely microcrystalline quartz (SiO₂), possibly chert or chalcedony) — mineral

Rounded quartz-rich pebble

Likely microcrystalline quartz (SiO₂), possibly chert or chalcedony

Chalcedony (Agate/Chert) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Chalcedony (Agate/Chert)

Chalcedony (Silicon Dioxide, SiO2)

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Sardonyx (Cryptocrystalline Quartz (SiO2)) — mineral

Sardonyx

Cryptocrystalline Quartz (SiO2)

Plume Agate or Moss Agate (Silicon dioxide (SiO2)) — Mineral

Plume Agate or Moss Agate

Silicon dioxide (SiO2)

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Agate (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Polished yellow-brown agate (likely carnelian or chalcedony) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration) — mineral

Polished yellow-brown agate (likely carnelian or chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Jasper (SiO2) — Mineral

Jasper

SiO2

Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Black Onyx (Silicon dioxide (SiO2)) — mineral

Black Onyx

Silicon dioxide (SiO2)

Possibly red jasper or chalcedony (Microcrystalline quartz (SiO₂), possibly iron-oxide-stained chalcedony) — mineral

Possibly red jasper or chalcedony

Microcrystalline quartz (SiO₂), possibly iron-oxide-stained chalcedony

Small tumbled quartz pebble, possibly chalcedony (Quartz (SiO₂), likely microcrystalline chalcedony) — mineral

Small tumbled quartz pebble, possibly chalcedony

Quartz (SiO₂), likely microcrystalline chalcedony

Banded Agate (Agate (Silicon Dioxide, SiO2)) — sedimentary

Banded Agate

Agate (Silicon Dioxide, SiO2)

Orange druzy agate geode fragment (Microcrystalline quartz (SiO₂), with chalcedony and druzy quartz crystals) — mineral

Orange druzy agate geode fragment

Microcrystalline quartz (SiO₂), with chalcedony and druzy quartz crystals

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished brown jasper (likely brecciated or orbicular jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions) — mineral

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

Green agate (polished bead) (Chalcedony, microcrystalline quartz (SiO₂)) — gemstone

Green agate (polished bead)

Chalcedony, microcrystalline quartz (SiO₂)

Agate / Chalcedony Nodule (SiO2 - Silicon Dioxide) — mineral

Agate / Chalcedony Nodule

SiO2 - Silicon Dioxide