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

Polished orbicular jasper (likely ocean jasper) (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and volcanic-mineral inclusions) — mineral

Polished orbicular jasper (likely ocean jasper)

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and volcanic-mineral inclusions

Coffee Bean Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Coffee Bean Jasper

Silicon Dioxide (SiO2) with impurities

Rhyolitic jasper / brecciated jasper (Silica-rich volcanic rock, chiefly microcrystalline quartz (SiO₂), with iron-oxide and clay/mineral impurities) — igneous

Rhyolitic jasper / brecciated jasper

Silica-rich volcanic rock, chiefly microcrystalline quartz (SiO₂), with iron-oxide and clay/mineral impurities

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Chalcedony (Silicon dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — mineral

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

Yellow Agate (Silicon Dioxide (SiO2)) — mineral

Yellow Agate

Silicon Dioxide (SiO2)

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Tumbled brown agate (Microcrystalline quartz (SiO₂), variety of chalcedony) — mineral

Tumbled brown agate

Microcrystalline quartz (SiO₂), variety of chalcedony

Tumbled blue chalcedony or pale aquamarine-like quartz (Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain) — mineral

Tumbled blue chalcedony or pale aquamarine-like quartz

Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain

Blue Lace Agate (Banded Chalcedony (SiO2)) — mineral

Blue Lace Agate

Banded Chalcedony (SiO2)

Carnelian (SiO2 (Variety of Chalcedony)) — gemstone

Carnelian

SiO2 (Variety of Chalcedony)

Chalcedony (likely common gray chalcedony) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (likely common gray chalcedony)

Microcrystalline quartz, SiO₂

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

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled brown jasper (likely) (Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony) — mineral

Tumbled brown jasper (likely)

Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony

Likely rough carnelian (orange-brown chalcedony) (Chalcedony, microcrystalline quartz (SiO₂); variety possibly carnelian) — mineral

Likely rough carnelian (orange-brown chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); variety possibly carnelian

Fancy Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Carnelian (Banded Agate) (Carnelian Chalcedony (SiO2)) — mineral

Carnelian (Banded Agate)

Carnelian Chalcedony (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Jasper with Quartz Vein (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz Vein

Silicon Dioxide (SiO2)

Agate (Brecciated / Moss Agate with Jasproid Inclusions) (Silicon Dioxide (SiO2)) — mineral

Agate (Brecciated / Moss Agate with Jasproid Inclusions)

Silicon Dioxide (SiO2)

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

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Jasper (specifically Red Jasper or Iron-stained Chert) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (specifically Red Jasper or Iron-stained Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Tumbled orange chalcedony or carnelian (Cryptocrystalline quartz, SiO₂; likely carnelian variety) — mineral

Tumbled orange chalcedony or carnelian

Cryptocrystalline quartz, SiO₂; likely carnelian variety

Red jasper (likely tumbled jasper/chert) (Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.) — sedimentary

Red jasper (likely tumbled jasper/chert)

Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.

Red jasper (likely brecciated jasper) (Microcrystalline quartz/chalcedony (SiO₂) colored by iron oxides, with white quartz or calcite veining) — mineral

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony (SiO₂) colored by iron oxides, with white quartz or calcite veining

Polished agate (likely Botswana or plume agate) (Microcrystalline quartz, mainly chalcedony (SiO₂), with iron-oxide inclusions) — gemstone

Polished agate (likely Botswana or plume agate)

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

Banded agate (likely jasper/chalcedony nodule) (Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide inclusions)) — mineral

Banded agate (likely jasper/chalcedony nodule)

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

Polished bloodstone (heliotrope) (Chalcedony, microcrystalline quartz (SiO₂), colored by iron-oxide inclusions) — gemstone

Polished bloodstone (heliotrope)

Chalcedony, microcrystalline quartz (SiO₂), colored by iron-oxide inclusions

Tumbled banded jasper (probable) (Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions) — mineral

Tumbled banded jasper (probable)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Polished red jasper beads (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Polished red jasper beads

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

Polished moss agate (Moss agate, a microcrystalline quartz variety (SiO₂) with green chlorite/actinolite or iron-manganese inclusions) — gemstone

Polished moss agate

Moss agate, a microcrystalline quartz variety (SiO₂) with green chlorite/actinolite or iron-manganese inclusions

Tumbled bloodstone (heliotrope), probable (Chalcedony (microcrystalline quartz, SiO₂) with iron-oxide inclusions) — mineral

Tumbled bloodstone (heliotrope), probable

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

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Agate Nodule (Silicon dioxide (Chalcedony/Quartz), SiO2) — sedimentary

Agate Nodule

Silicon dioxide (Chalcedony/Quartz), SiO2

Banded agate (likely carnelian/chalcedony) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration) — mineral

Banded agate (likely carnelian/chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Tumbled orbicular jasper (probable) (Jasper, microcrystalline quartz (SiO₂), with iron- and clay-rich inclusions) — mineral

Tumbled orbicular jasper (probable)

Jasper, microcrystalline quartz (SiO₂), with iron- and clay-rich inclusions

Polished orbicular jasper (likely ocean jasper) (Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions) — mineral

Polished orbicular jasper (likely ocean jasper)

Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions

Blue Lace Agate (Silicon Dioxide (SiO₂)) — sedimentary

Blue Lace Agate

Silicon Dioxide (SiO₂)

Jasper with Quartz inclusions (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Banded Calcite (often commercially sold as Mexican Onyx or Green Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often commercially sold as Mexican Onyx or Green Onyx)

Calcium Carbonate (CaCO3)