Rock Identifier

Category

Mineral (Chalcedony)

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

Learn about Mineral (Chalcedony) in the encyclopedia

Chalcedony

Blue Chalcedony

Blue Chalcedony

Chrome Chalcedony

Chrome Chalcedony

Gem Silica

Plume Agate

Landscape Agate

Landscape Agate

Chrysoprase

Sard

Prase

Glauconite

Sagenite Agate

Grape Agate

Dyed Chalcedony (Agate) (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Agate (SiO2) — mineral

Agate

SiO2

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

Chalcedony (Tumbled)

Cryptocrystalline Quartz (SiO2)

Polished blue chalcedony (likely seam agate) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions) — mineral

Polished blue chalcedony (likely seam agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions

Blue Chalcedony (Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)) — mineral

Blue Chalcedony

Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)

Chalcedony (specifically Blue Chalcedony or Common Opal variety) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (specifically Blue Chalcedony or Common Opal variety)

Silicon Dioxide (SiO₂)

Yellow Chalcedony (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony

Silicon Dioxide (SiO2)

Tree Agate (Dendritic Chalcedony (SiO2)) — sedimentary

Tree Agate

Dendritic Chalcedony (SiO2)

Tumbled brown chalcedony (possibly carnelian or agate) (Microcrystalline quartz, SiO₂; exact variety cannot be confirmed from the photo) — mineral

Tumbled brown chalcedony (possibly carnelian or agate)

Microcrystalline quartz, SiO₂; exact variety cannot be confirmed from the photo

Tumbled agate/chalcedony (Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions) — mineral

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions

Druzy Chalcedony (Agate Geode) (Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz) — mineral

Druzy Chalcedony (Agate Geode)

Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz

Banded agate/chalcedony fragment (Microcrystalline quartz (SiO₂), likely banded chalcedony or agate) — gemstone

Banded agate/chalcedony fragment

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Polished ocean jasper / orbicular jasper (likely) (Microcrystalline quartz (chalcedony), commonly with iron-oxide and other mineral inclusions) — mineral

Polished ocean jasper / orbicular jasper (likely)

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

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

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Purple Chalcedony (Silicon Dioxide (SiO2)) — mineral

Purple Chalcedony

Silicon Dioxide (SiO2)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Tumbled yellowish quartz or chalcedony (Quartz/chalcedony, SiO₂) — mineral

Tumbled yellowish quartz or chalcedony

Quartz/chalcedony, SiO₂

Chrysoprase (Chalcedony with nickel impurities (SiO2)) — gemstone

Chrysoprase

Chalcedony with nickel impurities (SiO2)

Chalcedony (likely blue agate) knapped into an arrowhead (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Chalcedony (likely blue agate) knapped into an arrowhead

Microcrystalline quartz, SiO₂ (chalcedony)

Ocean Jasper (Spherulitic Chalcedony (SiO2)) — mineral

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Tumbled orange chalcedony or jasper pebble (Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony/jasper) — mineral

Tumbled orange chalcedony or jasper pebble

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony/jasper

Agate (SiO2) — mineral

Agate

SiO2

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

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red jasper pebble (likely) (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides) — mineral

Red jasper pebble (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Tumbled orange carnelian (likely) (Chalcedony, microcrystalline quartz (SiO₂)) — gemstone

Tumbled orange carnelian (likely)

Chalcedony, microcrystalline quartz (SiO₂)

Polished jasper pebble (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions) — mineral

Polished jasper pebble

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

Tumbled jasper (Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities) — mineral

Tumbled jasper

Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities

Black Onyx (Chalcedony (SiO2 with inclusions)) — mineral

Black Onyx

Chalcedony (SiO2 with inclusions)

Tumbled agate or chalcedony (Microcrystalline quartz, SiO₂) — mineral

Tumbled agate or chalcedony

Microcrystalline quartz, SiO₂

Tumbled chalcedony (likely agate or jasper) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Tumbled yellow chalcedony (likely silicified material) (Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony or fossilized/silicified limestone) — mineral

Tumbled yellow chalcedony (likely silicified material)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony or fossilized/silicified limestone

Polished brecciated jasper (likely) (Microcrystalline quartz, SiO₂, with iron-oxide-rich brown fragments and pale silica) — mineral

Polished brecciated jasper (likely)

Microcrystalline quartz, SiO₂, with iron-oxide-rich brown fragments and pale silica

Picture Jasper (SiO2, Microcrystalline Quartz) — mineral

Picture Jasper

SiO2, Microcrystalline Quartz

Black Onyx (Cryptocrystalline Chalcedony (SiO2)) — mineral

Black Onyx

Cryptocrystalline Chalcedony (SiO2)

Agate / Chalcedony (Silicon dioxide (SiO2)) — mineral

Agate / Chalcedony

Silicon dioxide (SiO2)

Likely carnelian (red-orange chalcedony) (Chalcedony, microcrystalline quartz (SiO₂); carnelian is its iron-colored variety) — mineral

Likely carnelian (red-orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); carnelian is its iron-colored variety

Chrysoprase (Chalcedony (Silicon Dioxide, SiO2), flavored by Nickel) — mineral

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2), flavored by Nickel

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

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2)

Carnelian (Carnelian (Chalcedony - SiO2)) — mineral

Carnelian

Carnelian (Chalcedony - SiO2)

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

Banded Agate

Chalcedony (SiO2 with impurities)

Carnelian (Carnelian (Chalcedony / SiO2)) — mineral

Carnelian

Carnelian (Chalcedony / SiO2)

Agate (Banded Chalcedony (SiO2)) — mineral

Agate

Banded Chalcedony (SiO2)