Rock Identifier

Category

Mineral (Chalcedony)

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

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in a Geode) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geode

Druzy Quartz on Chert/Chalcedony (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz on Chert/Chalcedony

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

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

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Chalcedony (Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz variety)

Silicon Dioxide (SiO2)

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

Grey Chalcedony (Agate)

Silicon Dioxide (SiO2)

Chalcedony (specifically Agate or Water-worn Quartzite) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Agate or Water-worn Quartzite)

Silicon Dioxide (SiO2)

Jasper (Jasper (Silicon Dioxide, SiO2)) — mineral

Jasper

Jasper (Silicon Dioxide, SiO2)

Dendritic Agate (Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — Mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with Ferric Hydroxide impurities) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with Ferric Hydroxide impurities

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Agate (Tumbled) (Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)) — mineral

Banded Agate (Tumbled)

Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)

Green Calcite (Onyx Marble) (Calcium Carbonate (CaCO3)) — mineral

Green Calcite (Onyx Marble)

Calcium Carbonate (CaCO3)

Orange Calcite (Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Dendritic Agate or Tree Agate (Silicon Dioxide (SiO2) with impurities of manganese or iron oxide) — mineral

Dendritic Agate or Tree Agate

Silicon Dioxide (SiO2) with impurities of manganese or iron oxide

Botryoidal Chalcedony in Geode/Vug (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony in Geode/Vug

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Chalcedony (Agatized Coral / Rough Chalcedony Node) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

Jasper (Cream/Yellow variety) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (Cream/Yellow variety)

Silicon Dioxide (SiO2) with impurities

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

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (SiO2) - variety Chalcedony) — mineral

Agate

Silicon dioxide (SiO2) - variety Chalcedony

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

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Black Onyx (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Black Onyx

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Jasper (Silicon Dioxide (SiO2) with impurities) — mineral

Jasper

Silicon Dioxide (SiO2) with impurities

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper with Agate Inclusions (Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate) — sedimentary

Jasper with Agate Inclusions

Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Thunderegg (specifically a Jasper/Agate-filled Geode nodule) (Silicon Dioxide (SiO2) within Rhyolitic Matrix) — igneous

Thunderegg (specifically a Jasper/Agate-filled Geode nodule)

Silicon Dioxide (SiO2) within Rhyolitic Matrix

Quartz Geode (Crystalline Silicon Dioxide (SiO2) in Geode form) — sedimentary

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode form

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

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Petrified Wood (Silicified wood (Quartz/Chalcedony)) — Sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Jasper with Iron Staining (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Iron Staining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Petrified Wood

Silicified wood (primarily SiO2)

Druzy Quartz Geode (Oco or Moroccan variety) (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz Geode (Oco or Moroccan variety)

Silicon Dioxide (SiO2)

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

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

Jasper (Green Jasper/Heliotrope variety) (Silicon Dioxide (SiO2)) — sedimentary

Jasper (Green Jasper/Heliotrope variety)

Silicon Dioxide (SiO2)

Dendritic Opal (Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)) — mineral

Dendritic Opal

Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)