Rock Identifier

Category

Mineral (Chalcedony Variety)

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

Learn about Mineral (Chalcedony Variety) in the encyclopedia

Blue Chalcedony

Blue Chalcedony

Brookite

Agate

Prase

Chrysoprase

Sard

Blue Lace Agate

Blue Lace Agate

Carnelian

Blue Jasper

Jasper

Plume Agate

Sagenite Agate

Red Jasper (possibly) (Jasper (a variety of Chalcedony, SiO2)) — Mineral

Red Jasper (possibly)

Jasper (a variety of Chalcedony, SiO2)

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

Green agate (polished bead)

Chalcedony, microcrystalline quartz (SiO₂)

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Polished banded agate (likely petrified wood) (Microcrystalline quartz (SiO₂); possibly silicified wood) — mineral

Polished banded agate (likely petrified wood)

Microcrystalline quartz (SiO₂); possibly silicified wood

Red jasper (likely) (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Red jasper (likely)

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

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Carnelian Agate

Carnelian (Silicon Dioxide: SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Tumbled agate/chalcedony pebble (Microcrystalline quartz (SiO₂), likely brown/banded agate or jasper) — mineral

Tumbled agate/chalcedony pebble

Microcrystalline quartz (SiO₂), likely brown/banded agate or jasper

Polished brecciated jasper (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and pale silica-rich fragments) — mineral

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and pale silica-rich fragments

Brown chalcedony (agate-like flint/chert fragment) (Chalcedony, microcrystalline quartz (SiO₂); identification is tentative from the photo) — mineral

Brown chalcedony (agate-like flint/chert fragment)

Chalcedony, microcrystalline quartz (SiO₂); identification is tentative from the photo

Brown chalcedony (likely carnelian or agate fragment) (Microcrystalline quartz, SiO₂; iron-oxide-colored chalcedony) — mineral

Brown chalcedony (likely carnelian or agate fragment)

Microcrystalline quartz, SiO₂; iron-oxide-colored chalcedony

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

Chalcedony (Tumbled)

Cryptocrystalline Quartz (SiO2)

Chalcedony in Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Chalcedony (Quartz Var.) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz Var.)

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely milky agate) (Microcrystalline quartz, SiO₂; chalcedony/agate variety) — mineral

Tumbled chalcedony (likely milky agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Blue Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)) — Mineral

Blue Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)

Banded Agate (Chalcedony (SiO2) with impurities) — mineral

Banded Agate

Chalcedony (SiO2) with impurities

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

Chrysoprase

Silicon dioxide with nickel impurities (SiO2 + Ni)

Blue agate (likely dyed and polished) (Microcrystalline quartz, SiO₂ (chalcedony); blue color may be dye) — mineral

Blue agate (likely dyed and polished)

Microcrystalline quartz, SiO₂ (chalcedony); blue color may be dye

Yellow jasper (likely polished/tumbled) (Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image) — mineral

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image

Tumbled carnelian (Carnelian, orange-red chalcedony (microcrystalline SiO₂)) — mineral

Tumbled carnelian

Carnelian, orange-red chalcedony (microcrystalline SiO₂)

Jasper (Silicon dioxide (SiO2)) — mineral

Jasper

Silicon dioxide (SiO2)

Polished carnelian agate (Microcrystalline quartz (SiO₂), chalcedony with iron-oxide coloration) — mineral

Polished carnelian agate

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

Jasper (Silicon dioxide (SiO2)) — mineral

Jasper

Silicon dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

Fancy Jasper (Silicon Dioxide (SiO2)) — mineral

Fancy Jasper

Silicon Dioxide (SiO2)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Polished agate (likely carnelian/mossy chalcedony) (Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide banding and possible inclusions) — mineral

Polished agate (likely carnelian/mossy chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide banding and possible inclusions

Polished reddish-brown gemstone, likely carnelian (Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — gemstone

Polished reddish-brown gemstone, likely carnelian

Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Carnelian (red-orange chalcedony) (Chalcedony, cryptocrystalline SiO₂; quartz-group mineral) — gemstone

Carnelian (red-orange chalcedony)

Chalcedony, cryptocrystalline SiO₂; quartz-group mineral

Dendritic agate or included chalcedony (likely tumbled) (Microcrystalline quartz, SiO₂; inclusions likely manganese-oxide dendrites or iron minerals) — gemstone

Dendritic agate or included chalcedony (likely tumbled)

Microcrystalline quartz, SiO₂; inclusions likely manganese-oxide dendrites or iron minerals

Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (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

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Jasper (likely brecciated jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — mineral

Jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Polished chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions) — mineral

Polished chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)