Rock Identifier

Category

Mineral_variety_of_chalcedony

Browse mineral_variety_of_chalcedony specimens identified by the Rock Identifier community.

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Prase

Blue Jasper

Tumbled amber-colored chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; orange-red variety commonly termed carnelian) — mineral

Tumbled amber-colored chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; orange-red variety commonly termed carnelian

Orange chalcedony or jasper fragment (Microcrystalline quartz (SiO₂), likely chalcedony/jasper) — mineral

Orange chalcedony or jasper fragment

Microcrystalline quartz (SiO₂), likely chalcedony/jasper

Yellow Banded Agate (Silicon Dioxide (SiO₂)) — mineral

Yellow Banded Agate

Silicon Dioxide (SiO₂)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Tumbled white chalcedony (milky agate) (Microcrystalline quartz, SiO₂; chalcedony, locally grading toward milky agate) — mineral

Tumbled white chalcedony (milky agate)

Microcrystalline quartz, SiO₂; chalcedony, locally grading toward milky agate

Grey Agate (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Grey Agate (Tumbled)

Silicon Dioxide (SiO2)

Jasper (Quartz (SiO2) with impurities) — sedimentary

Jasper

Quartz (SiO2) with impurities

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Red Jasper

Jasper (Silicon Dioxide) - SiO2

sedimentary/mineral

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

Yellow Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Polished banded agate (Agate, a banded variety of chalcedony (microcrystalline SiO₂)) — mineral

Polished banded agate

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Dalmatian Jasper (Dalmatian Stone) (Perthitic Feldspar with Arfvedsonite/Riebeckite) — igneous

Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite/Riebeckite

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

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Blue chalcedony (likely dyed or coated) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

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

Blue Lace Agate

Chalcedony (SiO2) with trace impurities

Dyed Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Dyed Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

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

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

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

Tumbled yellowish quartz or chalcedony

Quartz/chalcedony, SiO₂

Tumbled red jasper (Jasper, an opaque, iron-bearing variety of microcrystalline quartz (SiO₂)) — mineral

Tumbled red jasper

Jasper, an opaque, iron-bearing variety of microcrystalline quartz (SiO₂)

Yellow chalcedony (likely tumbled quartz) (Chalcedony, cryptocrystalline SiO₂; possibly iron-stained quartz or yellow jasper) — mineral

Yellow chalcedony (likely tumbled quartz)

Chalcedony, cryptocrystalline SiO₂; possibly iron-stained quartz or yellow jasper

Red jasper (Microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red jasper

Microcrystalline quartz (SiO₂), colored mainly by iron oxides

Tumbled jasper or chert (Microcrystalline quartz (SiO₂), likely iron-stained jasper) — mineral

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely iron-stained jasper

Tumbled yellow jasper or chert (Microcrystalline quartz (SiO₂), likely iron-oxide-stained chalcedony/chert) — mineral

Tumbled yellow jasper or chert

Microcrystalline quartz (SiO₂), likely iron-oxide-stained chalcedony/chert

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

Agate in Matrix (Silicon Dioxide (SiO2) within host rock) — mineral

Agate in Matrix

Silicon Dioxide (SiO2) within host rock

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Brown Agate (Silicon Dioxide (SiO2)) — mineral

Brown Agate

Silicon Dioxide (SiO2)

Gray Agate with Druzy Quartz Geode (Cryptocrystalline Quartz (SiO2)) — mineral

Gray Agate with Druzy Quartz Geode

Cryptocrystalline Quartz (SiO2)

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

Chalcedony (Agate/Carnelian)

Silicon Dioxide (SiO2)

Red Jasper (Red Jasper (SiO2 with Hematite inclusions)) — mineral

Red Jasper

Red Jasper (SiO2 with Hematite inclusions)

Dyed Agate (SiO2) — Mineral

Dyed Agate

SiO2

Agate (specifically Botswana or Lake Superior style chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically Botswana or Lake Superior style chalcedony)

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chalcedony (Common Opal variant or Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Quartz)

Silicon Dioxide (SiO2)

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

Quartz (Agate/Chalcedony)

Silicon Dioxide (SiO2)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂), likely milky quartz) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), likely milky quartz

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)

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Tumbled chalcedony or jasper (Microcrystalline quartz (SiO₂), likely iron-bearing chalcedony/jasper) — mineral

Tumbled chalcedony or jasper

Microcrystalline quartz (SiO₂), likely iron-bearing chalcedony/jasper

Polished brown stone, possibly jasper (Likely iron-rich microcrystalline quartz (SiO₂); exact identification is uncertain from the image) — gemstone

Polished brown stone, possibly jasper

Likely iron-rich microcrystalline quartz (SiO₂); exact identification is uncertain from the image