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

Blue Lace Agate

Blue Lace Agate

Chrysoprase

Sard

Carnelian

Blue Jasper

Jasper

Plume Agate

Sagenite Agate

Tumbled honey-brown chalcedony or agate (Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing) — mineral

Tumbled honey-brown chalcedony or agate

Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing

Agate (Cryptocrystalline Silicon Dioxide (SiO2)) — mineral

Agate

Cryptocrystalline Silicon Dioxide (SiO2)

Red Jasper (Jasper (Silicon Dioxide) - SiO2) — sedimentary/mineral

Red Jasper

Jasper (Silicon Dioxide) - SiO2

sedimentary/mineral

Tumbled Carnelian and Quartz Mix (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

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

Red Jasper

Jasper (Silicon Dioxide, SiO2)

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

Red jasper (likely polished/chipped fragment)

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

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

Agate

Chalcedony (Silicon Dioxide, SiO2)

Agate Geode Nodule (Chalcedony / Quartz (SiO2)) — mineral

Agate Geode Nodule

Chalcedony / Quartz (SiO2)

Polished brown jasper (Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich variety) — mineral

Polished brown jasper

Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich variety

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

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

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron inclusions

Jasper pebble, likely brecciated jasper (Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities) — mineral

Jasper pebble, likely brecciated jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Banded agate tower (likely onyx/chalcedony) (Microcrystalline quartz, SiO₂; commonly called banded agate or black-and-white onyx) — mineral

Banded agate tower (likely onyx/chalcedony)

Microcrystalline quartz, SiO₂; commonly called banded agate or black-and-white onyx

Polished brecciated jasper (likely dragon-blood or leopard jasper) (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Polished brecciated jasper (likely dragon-blood or leopard jasper)

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

Tumbled yellow-orange jasper (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — mineral

Tumbled yellow-orange jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Polished banded jasper pebble (Jasper, a microcrystalline quartz variety (SiO₂), with iron-oxide and clay/mineral impurities) — mineral

Polished banded jasper pebble

Jasper, a microcrystalline quartz variety (SiO₂), with iron-oxide and clay/mineral impurities

Tree Agate (Dendritic Agate (Silicon Dioxide, SiO2)) — mineral

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Banded Agate / Chalcedony (Silicon Dioxide (SiO2) with trace impurities) — mineral

Banded Agate / Chalcedony

Silicon Dioxide (SiO2) with trace impurities

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

Yellow Jasper

Silicon Dioxide with Limonite/Goethite inclusions (SiO2)

Iron-rich chert or jasper (Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite) — sedimentary

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite

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

Agate (Chalcedony)

Cryptocrystalline Quartz (SiO2)

Banded Agate (specifically Carnelian Agate color) (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Banded Agate (specifically Carnelian Agate color)

Silicon Dioxide (SiO2) - variety of Chalcedony

Banded Agate (Chert/Chaldcedony) (Silicon Dioxide (SiO₂)) — mineral

Banded Agate (Chert/Chaldcedony)

Silicon Dioxide (SiO₂)

Chalcedony (Cryptocrystalline Quartz (SiO2)) — Mineral

Chalcedony

Cryptocrystalline Quartz (SiO2)

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

Banded Agate (Jasper-Agate)

Silicon Dioxide (SiO2) - Chalcedony Variety

Black Onyx (Silicon Dioxide (SiO2) with cryptocrystalline structure) — mineral

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

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

Chalcedony (likely common gray chalcedony)

Microcrystalline quartz, SiO₂

Agate (Carnelian Agate with Quartz Matrix) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian Agate with Quartz Matrix)

Silicon Dioxide (SiO2)

Jasper (brecciated or orbicular variety) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary/mineral

Jasper (brecciated or orbicular variety)

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary/mineral

Tumbled brown chalcedony or agate (Microcrystalline quartz, SiO₂ (likely chalcedony; banding is not visible)) — gemstone

Tumbled brown chalcedony or agate

Microcrystalline quartz, SiO₂ (likely chalcedony; banding is not visible)

Carnelian (SiO2 (Variety of Chalcedony)) — gemstone

Carnelian

SiO2 (Variety of Chalcedony)

Jasper (Jasper (Silica/Quartz) - SiO2) — mineral

Jasper

Jasper (Silica/Quartz) - SiO2

Black Onyx (Onyx (Silicon Dioxide, SiO2)) — mineral

Black Onyx

Onyx (Silicon Dioxide, SiO2)

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

Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Agate Nodule / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Agate Nodule / Chalcedony

Silicon Dioxide (SiO2)

Banded Agate (Pink/White) (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Banded Agate (Pink/White)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)

Calcium Carbonate (CaCO3)

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

Dyed Blue Agate Slice

Chalcedony (Silicon Dioxide, SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) - variety of Chalcedony) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Blue Lace Agate (Chalcedony (SiO2) with trace impurities) — mineral

Blue Lace Agate

Chalcedony (SiO2) with trace impurities

Tumbled brown quartz/chalcedony (probable) (Quartz, SiO₂; possibly brown chalcedony or jasper) — mineral

Tumbled brown quartz/chalcedony (probable)

Quartz, SiO₂; possibly brown chalcedony or jasper