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

Botryoidal Chalcedony (Geode fragment) (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony (Geode fragment)

Silicon Dioxide (SiO2)

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

Moss Agate

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

Geode Nodules / Keokuk Geode (Quartz / Chalcedony Geode (SiO2)) — sedimentary

Geode Nodules / Keokuk Geode

Quartz / Chalcedony Geode (SiO2)

Polished jasper and banded agate specimens (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other inclusions) — mineral

Polished jasper and banded agate specimens

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other inclusions

Polished brecciated jasper (likely septarian or iron-rich jasper) (Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments) — sedimentary

Polished brecciated jasper (likely septarian or iron-rich jasper)

Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Sardonyx or Carnelian Agate (Silicon Dioxide (SiO2) with iron impurities) — mineral

Sardonyx or Carnelian Agate

Silicon Dioxide (SiO2) with iron impurities

Ocean Jasper (Orbicular Quartz (SiO2)) — Mineral

Ocean Jasper

Orbicular Quartz (SiO2)

Polished/tumbled brown-and-white mineral fragment (Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral) — mineral

Polished/tumbled brown-and-white mineral fragment

Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral

Milky quartz (likely quartz fragment) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Dyed Agate / Quartz (Silicon Dioxide (SiO2) with artificial dye) — mineral

Dyed Agate / Quartz

Silicon Dioxide (SiO2) with artificial dye

Chrysoprase (Silicon dioxide (SiO2) with nickel impurities) — mineral

Chrysoprase

Silicon dioxide (SiO2) with nickel impurities

Polished yellow chalcedony (likely quartz pebble) (Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper) — mineral

Polished yellow chalcedony (likely quartz pebble)

Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Chrysoprase (Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities) — mineral

Chrysoprase

Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities

Chrysoprase (Silicon dioxide with nickel impurities (SiO2 + Ni)) — mineral

Chrysoprase

Silicon dioxide with nickel impurities (SiO2 + Ni)

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

Blue Chalcedony

Cryptocrystalline Silicon Dioxide (SiO2)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Chalcedony (Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Chalcedony (Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Blue Chalcedony (Microcrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Microcrystalline Quartz (SiO2)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

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

Blue Chalcedony

Cryptocrystalline Silicon Dioxide (SiO2)

Agate (or Chalcedony) (SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz) — Mineral

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Agate (Chalcedony) (Cryptocrystalline Silica or Silicon Dioxide (SiO2)) — mineral

Agate (Chalcedony)

Cryptocrystalline Silica or Silicon Dioxide (SiO2)

Agate (Chalcedony) (Cryptocrystalline Quartz (SiO2)) — mineral

Agate (Chalcedony)

Cryptocrystalline Quartz (SiO2)

Polished/tumbled agate (likely carnelian or iron-stained chalcedony) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions) — mineral

Polished/tumbled agate (likely carnelian or iron-stained chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions

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

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Marcasite on Agate / Sphalerite-Pyrite Agate Geode Slice (Marcasite (FeS2) / Pyrite on Quartz (SiO2)) — mineral

Marcasite on Agate / Sphalerite-Pyrite Agate Geode Slice

Marcasite (FeS2) / Pyrite on Quartz (SiO2)

Likely tumbled or cut quartz/chalcedony fragment (Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz) — mineral

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

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

Chalcedony Geode / Quartz Druzy

Silicon Dioxide (SiO2)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

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

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Tumbled Moss Agate

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

Dendritic Agate / Chalcedony (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate / Chalcedony

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

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

Banded Agate (Carnelian-Agate)

Silicon Dioxide (SiO2)

Polished Agate Geode (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Polished Agate Geode

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chalcedony (Tumbled Agate/Jasper) (Silicon dioxide (SiO2)) — sedimentary

Chalcedony (Tumbled Agate/Jasper)

Silicon dioxide (SiO2)

Green Jasper / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Green Jasper / Chalcedony

Silicon Dioxide (SiO2)