Rock Identifier

Category

Mineral (Chalcedony)

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

Learn about Mineral (Chalcedony) in the encyclopedia

Chalcedony

Chrome Chalcedony

Chrome Chalcedony

Blue Chalcedony

Blue Chalcedony

Gem Silica

Plume Agate

Landscape Agate

Landscape Agate

Chrysoprase

Sard

Prase

Glauconite

Sagenite Agate

Grape Agate

Blue Lace Agate (Cryptocrystalline Quartz (SiO2) with trace minerals) — sedimentary

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

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

Chalcedony (Agate/Carnelian)

Silicon Dioxide (SiO2)

Banded agate (likely carnelian–chalcedony agate) (Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide bands)) — mineral

Banded agate (likely carnelian–chalcedony agate)

Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide bands)

Moss Agate (Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)

Amethyst (Geode) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Geode)

Silicon Dioxide (SiO2) with iron impurities

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxide) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxide

Yellow tumbled/rough chalcedony, possibly citrine or dyed agate (Chalcedony (microcrystalline SiO₂), with yellow coloration likely from iron oxides; exact identification is uncertain from the photograph) — mineral

Yellow tumbled/rough chalcedony, possibly citrine or dyed agate

Chalcedony (microcrystalline SiO₂), with yellow coloration likely from iron oxides; exact identification is uncertain from the photograph

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Dalmation Stone (often called Dalmatian Jasper) (Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite) — igneous

Dalmation Stone (often called Dalmatian Jasper)

Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite

Quartz Geode (Unopened) (Silicon Dioxide (SiO2) with Iron Oxides) — sedimentary

Quartz Geode (Unopened)

Silicon Dioxide (SiO2) with Iron Oxides

Dyed Agate (SiO2 (Silicon Dioxide)) — mineral

Dyed Agate

SiO2 (Silicon Dioxide)

Ocean Jasper (Orbicular Jasper / Chalcedony (SiO2)) — Mineral

Ocean Jasper

Orbicular Jasper / Chalcedony (SiO2)

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with Hematite impurities) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with Hematite impurities

Dalmatian Jasper (Peralkaline rhyolite with arfvedsonite inclusions) — igneous

Dalmatian Jasper

Peralkaline rhyolite with arfvedsonite inclusions

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

Chalcedony (Botryoidal Agate)

Silicon Dioxide (SiO2)

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

Polished red jasper

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

Yellow Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — mineral

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Banded Agate (Silicon dioxide (SiO2) - variety of Chalcedony) — sedimentary

Banded Agate

Silicon dioxide (SiO2) - variety of Chalcedony

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

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Banded Agate (Gray Agate) (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Banded Agate (Gray Agate)

Silicon Dioxide (SiO2) - Chalcedony

Tumbled blue-gray chalcedony (likely blue agate) (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Tumbled blue-gray chalcedony (likely blue agate)

Chalcedony, microcrystalline quartz (SiO₂)

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — sedimentary or metamorphic

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

sedimentary or metamorphic

Agate (Carnelian type) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian type)

Silicon Dioxide (SiO2)

Agate (specifically a Yellow/Honey Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (specifically a Yellow/Honey Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Geode (Unopened) (Vug or Geode (primarily Silicon Dioxide, SiO2)) — sedimentary

Geode (Unopened)

Vug or Geode (primarily Silicon Dioxide, SiO2)

Polished green moss agate cabochon (Moss agate: microcrystalline quartz (SiO₂) with included chlorite/actinolite or iron-manganese minerals) — mineral

Polished green moss agate cabochon

Moss agate: microcrystalline quartz (SiO₂) with included chlorite/actinolite or iron-manganese minerals

Jasper (likely Polychrome or Ocean Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (likely Polychrome or Ocean Jasper)

Silicon Dioxide (SiO2) with impurities

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

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Quartz Geode (Quartz (Silicon Dioxide, SiO2) Geode) — sedimentary

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Ocean Jasper (Spherulitic Chalcedony (SiO2 with impurities)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2 with impurities)

Tumbled blue-green chalcedony (likely dyed agate or chrysocolla-bearing chalcedony) (Microcrystalline quartz, SiO₂; blue coloration may reflect chrysocolla, copper minerals, or dye) — mineral

Tumbled blue-green chalcedony (likely dyed agate or chrysocolla-bearing chalcedony)

Microcrystalline quartz, SiO₂; blue coloration may reflect chrysocolla, copper minerals, or dye

Beach Pebble (likely Quartz or Chalcedony) (Silicon Dioxide (SiO2)) — Mineral

Beach Pebble (likely Quartz or Chalcedony)

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon dioxide (Chalcedony), SiO2) — mineral

Carnelian Agate

Silicon dioxide (Chalcedony), SiO2

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Carnelian Agate (Silicon Dioxide (Chalcedony variety)) — mineral

Carnelian Agate

Silicon Dioxide (Chalcedony variety)

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

Carnelian / Agate

Silicon Dioxide (SiO2) - Chalcedony

Carnelian (Tumbled) (SiO2 (Silicon Dioxide / Chalcedony)) — mineral

Carnelian (Tumbled)

SiO2 (Silicon Dioxide / Chalcedony)

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

Agate

Silicon Dioxide (Chalcedony), SiO2