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

Chalcedony (Desert Rose or Botryoidal Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Desert Rose or Botryoidal Chalcedony)

Silicon Dioxide (SiO2)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled yellow chalcedony (Microcrystalline quartz (SiO₂), likely yellow chalcedony or low-grade citrine-like quartz) — mineral

Tumbled yellow chalcedony

Microcrystalline quartz (SiO₂), likely yellow chalcedony or low-grade citrine-like quartz

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions (Silicon Dioxide (SiO2) with iron oxide and silicate impurities) — sedimentary

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

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

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony

Likely tumbled red mineral or glass imitation (Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony) — mineral

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Pink chalcedony (pink agate-like quartz) (Microcrystalline quartz, SiO₂ (chalcedony; likely iron-bearing)) — mineral

Pink chalcedony (pink agate-like quartz)

Microcrystalline quartz, SiO₂ (chalcedony; likely iron-bearing)

Botryoidal chalcedony (likely druzy agate) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Botryoidal chalcedony (likely druzy agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Plume Agate (Silicon Dioxide (SiO2)) — mineral

Plume Agate

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper / Variolitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Orbicular Jasper / Variolitic Chalcedony (SiO2)

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

Chalcedony (Agate nodule fragment)

Silicon Dioxide (SiO2)

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

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron inclusions

Tumbled carnelian/chalcedony (Microcrystalline quartz (SiO₂), iron-oxide-stained chalcedony) — mineral

Tumbled carnelian/chalcedony

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

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

Chalcedony / Agate Pebble

Silicon Dioxide (SiO2)

Chalcedony (specifically Agate and Carnelian variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony (specifically Agate and Carnelian variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Carnelian (Orange Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Orange Chalcedony)

Silicon Dioxide (SiO2)

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

Agate (Chalcedony Variation)

Silicon Dioxide (SiO2)

Tumbled chalcedony pebble (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Tumbled chalcedony pebble

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled brown stone, possibly amber or polished agate (Indeterminate from image; possibilities include amber (fossilized plant resin, organic) or chalcedony/quartz (SiO₂)) — mineral

Tumbled brown stone, possibly amber or polished agate

Indeterminate from image; possibilities include amber (fossilized plant resin, organic) or chalcedony/quartz (SiO₂)

Rhyolite (possibly porphyritic and altered) (Volcanic felsic rock; primarily quartz, alkali feldspar, plagioclase, and volcanic glass, with iron-oxide alteration) — igneous

Rhyolite (possibly porphyritic and altered)

Volcanic felsic rock; primarily quartz, alkali feldspar, plagioclase, and volcanic glass, with iron-oxide alteration

Petrified Wood (Silicified wood (Quartz replacement, SiO2)) — fossil

Petrified Wood

Silicified wood (Quartz replacement, SiO2)

Chalcedony with Druzy Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

Chalcedony with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

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

Blue Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Crazy Lace Agate (Agate (Banded Chalcedony) - SiO2) — Mineral

Crazy Lace Agate

Agate (Banded Chalcedony) - SiO2

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

Agate

Chalcedony (Silicon Dioxide, SiO2)

Black Onyx (Chalcedony (SiO2) with parallel banding) — mineral

Black Onyx

Chalcedony (SiO2) with parallel banding

Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Chert / Chalcedony

Silicon Dioxide (SiO2)

Quartz Geode with Chalcedony (Silicon Dioxide (SiO2)) — mineral

Quartz Geode with Chalcedony

Silicon Dioxide (SiO2)

Tumbled black-and-white banded stone, likely onyx or agate (Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx) — mineral

Tumbled black-and-white banded stone, likely onyx or agate

Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx

Banded Agate (Dyed / Polished) (Microcrystalline Quartz (SiO2)) — mineral

Banded Agate (Dyed / Polished)

Microcrystalline Quartz (SiO2)

Carnelian Agate (SiO2 (Silicon Dioxide with Iron Oxide impurities)) — mineral

Carnelian Agate

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Dyed Agate (SiO2 (Silicon Dioxide)) — Mineral

Dyed Agate

SiO2 (Silicon Dioxide)

Dyed Blue Agate (Dragon Vein Agate) (Silicon Dioxide (SiO2) with artificial cobalt/organic dyes) — mineral

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Moss Agate Geode Sphere (Silicon Dioxide (SiO2) - Chalcedony with Chlorite or Manganese inclusions) — mineral

Moss Agate Geode Sphere

Silicon Dioxide (SiO2) - Chalcedony with Chlorite or Manganese inclusions

Agate (Geode nodule fragment) (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Agate (Geode nodule fragment)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Red jasper (likely brecciated or iron-stained jasper) (Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides) — metamorphic

Red jasper (likely brecciated or iron-stained jasper)

Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides

Banded Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Banded Calcite

Calcite (Calcium Carbonate, CaCO3)

Tumbled orange chalcedony and a gray stone disk (Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate) — mineral

Tumbled orange chalcedony and a gray stone disk

Chalcedony (microcrystalline quartz, SiO₂); disk likely fine-grained sandstone or slate

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions

Lake Superior Agate (Silicon Dioxide (Chalcedony variety)) — sedimentary

Lake Superior Agate

Silicon Dioxide (Chalcedony variety)