Rock Identifier

Category

Mineral (Chalcedony)

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

Learn about Mineral (Chalcedony) in the encyclopedia

Chalcedony

Chrome Chalcedony

Chrome Chalcedony

Blue Chalcedony

Blue Chalcedony

Gem Silica

Plume Agate

Landscape Agate

Landscape Agate

Chrysoprase

Sard

Prase

Glauconite

Sagenite Agate

Grape Agate

Blue lace agate (likely dyed or color-enhanced) (Microcrystalline quartz (chalcedony), SiO₂) — mineral

Blue lace agate (likely dyed or color-enhanced)

Microcrystalline quartz (chalcedony), SiO₂

Bloodstone (Chalcedony (Variety Heliotrope), SiO2) — mineral

Bloodstone

Chalcedony (Variety Heliotrope), SiO2

Lake Superior Agate (Silicon Dioxide (Chalcedony variety)) — gemstone

Lake Superior Agate

Silicon Dioxide (Chalcedony variety)

Green Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Green Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Tumbled banded jasper, likely brecciated jasper (Microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions) — mineral

Tumbled banded jasper, likely brecciated jasper

Microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions

Chalcedony (River Stone) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (River Stone)

Microcrystalline Quartz (SiO2)

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

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Tumbled brecciated jasper (Jasper (microcrystalline quartz, SiO₂), likely brecciated and iron-oxide stained) — mineral

Tumbled brecciated jasper

Jasper (microcrystalline quartz, SiO₂), likely brecciated and iron-oxide stained

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

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

Tumbled moss agate (Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions) — mineral

Tumbled moss agate

Chalcedony (microcrystalline quartz, SiO₂) with moss-like 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

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

Agate Nodule

Silicon dioxide (Chalcedony/Quartz), SiO2

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

Jasper

Silicon dioxide (SiO2) with impurities

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)

Green Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Green Jasper

Microcrystalline Quartz (Chalcedony), SiO2

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Agate (Silicon dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon dioxide (Chalcedony), SiO2

Tumbled quartz-rich agate/geode fragment (Microcrystalline quartz (SiO₂), likely chalcedony with crystalline quartz and possible iron-oxide inclusions) — mineral

Tumbled quartz-rich agate/geode fragment

Microcrystalline quartz (SiO₂), likely chalcedony with crystalline quartz and possible iron-oxide inclusions

Dyed Agate Geode (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Banded Chalcedony

Bloodstone (Heliotrope) (Cryptocrystalline Quartz (SiO2 with iron oxide inclusions)) — mineral

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2 with iron oxide inclusions)

Tumbled jasper or jasper-rich chert (Microcrystalline quartz (SiO₂) with iron-oxide impurities) — mineral

Tumbled jasper or jasper-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide impurities

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Banded Agate (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (Quartz / Chalcedony replacement)) — fossil

Petrified Wood

Silicified wood (Quartz / Chalcedony replacement)

Ocean Jasper (SiO2 (Silicon Dioxide with impurities)) — mineral

Ocean Jasper

SiO2 (Silicon Dioxide with impurities)

Flower Agate (Silicon Dioxide (SiO2) with Plume Inclusions) — mineral

Flower Agate

Silicon Dioxide (SiO2) with Plume Inclusions

Chalcedony-rich agate/jasper (Microcrystalline quartz (SiO₂), likely iron-stained jasper with chalcedony) — mineral

Chalcedony-rich agate/jasper

Microcrystalline quartz (SiO₂), likely iron-stained jasper with chalcedony

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

Quartz pebble (Agate / Chalcedony)

Silicon Dioxide (SiO2)

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

Quartz Pebble (Beach Chalcedony)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian pebbles) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Carnelian pebbles)

Cryptocrystalline Quartz (SiO2)

Blue Lace Agate (Chalcedony (a form of Quartz) - SiO2) — Mineral

Blue Lace Agate

Chalcedony (a form of Quartz) - SiO2

Geode / Fossilized Gastropod or Shell Cast (Silicon dioxide (Quartz) replacement / fossil mold) — sedimentary

Geode / Fossilized Gastropod or Shell Cast

Silicon dioxide (Quartz) replacement / fossil mold

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

Agate

Silicon Dioxide (Quartz), SiO2

Agate (Agate (Cryptocrystalline Quartz, SiO2)) — Mineral

Agate

Agate (Cryptocrystalline Quartz, SiO2)

Weathered jasper/chert nodule (Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert) — sedimentary

Weathered jasper/chert nodule

Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert

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

Blue Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

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

Agate (Carnelian-like)

Chalcedony (Silicon Dioxide, SiO2)

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

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Chrysocolla Chalcedony (Hydrated Copper Phyllosilicate (Cu,Al)2H2Si2O5(OH)4 + SiO2) — mineral

Chrysocolla Chalcedony

Hydrated Copper Phyllosilicate (Cu,Al)2H2Si2O5(OH)4 + SiO2