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 carnelian agate (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — gemstone

Tumbled carnelian agate

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

Red Jasper (Skull Carving) (Jasper, a cryptocrystalline variety of Quartz (SiO2)) — sedimentary

Red Jasper (Skull Carving)

Jasper, a cryptocrystalline variety of Quartz (SiO2)

Tumbled chalcedony (likely carnelian or brown agate) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration) — gemstone

Tumbled chalcedony (likely carnelian or brown agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Tumbled blue chalcedony (likely agate or common opal) (Microcrystalline quartz, SiO₂; possibly hydrated silica opal, SiO₂·nH₂O) — mineral

Tumbled blue chalcedony (likely agate or common opal)

Microcrystalline quartz, SiO₂; possibly hydrated silica opal, SiO₂·nH₂O

Tumbled jasper (Microcrystalline quartz (chalcedony), predominantly SiO₂, with iron-oxide inclusions) — igneous

Tumbled jasper

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

Green Jasper (Silicon Dioxide (SiO2) with iron silicate inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Yellow Jasper (Silicon Dioxide (SiO2) with high iron inclusion) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with high iron inclusion

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Carnelian (Cryptocrystalline Quartz (SiO2 with Hematite impurities)) — mineralish (variety of chalcedony)

Carnelian

Cryptocrystalline Quartz (SiO2 with Hematite impurities)

mineralish (variety of chalcedony)

Tumbled banded agate (Chalcedony (microcrystalline quartz), SiO₂) — mineral

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Jasper pebble (Yellow/Brown Jasper) (Silicon Dioxide (Microcrystalline Quartz, SiO2 with Iron Oxide impurities)) — sedimentary

Jasper pebble (Yellow/Brown Jasper)

Silicon Dioxide (Microcrystalline Quartz, SiO2 with Iron Oxide impurities)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Green Jasper / Chert) (Silicon Dioxide (SiO2) with iron/clay inclusions) — sedimentary

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2) with iron/clay inclusions

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Red jasper (iron-rich chalcedony), possibly brecciated (Jasper: microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides) — mineral

Red jasper (iron-rich chalcedony), possibly brecciated

Jasper: microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides

Banded Onyx (Cave Calcite) (Calcite (CaCO3), often called Mexican Onyx or Travertine) — sedimentary

Banded Onyx (Cave Calcite)

Calcite (CaCO3), often called Mexican Onyx or Travertine

Moss Agate (Moss Agate (a variety of Chalcedony, SiO

₂)) — Mineral (specifically a variety of Chalcedony, which is microcrystalline Quartz)

Moss Agate

Moss Agate (a variety of Chalcedony, SiO ₂)

Mineral (specifically a variety of Chalcedony, which is microcrystalline Quartz)

Polished brecciated jasper (Silicified microcrystalline quartz (chalcedony), commonly called jasper) — sedimentary

Polished brecciated jasper

Silicified microcrystalline quartz (chalcedony), commonly called jasper

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

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Quartz (Chert/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Yellow-brown jasper or silicified volcanic rock (Microcrystalline quartz (chalcedony), SiO₂, likely jasper) — mineral

Yellow-brown jasper or silicified volcanic rock

Microcrystalline quartz (chalcedony), SiO₂, likely jasper

Banded jasper (likely mookaite or brecciated jasper) (Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and clay inclusions) — mineral

Banded jasper (likely mookaite or brecciated jasper)

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

Polished/tumbled jasper or chert pebble (Microcrystalline quartz (SiO₂), likely ferruginous jasper/chert) — mineral

Polished/tumbled jasper or chert pebble

Microcrystalline quartz (SiO₂), likely ferruginous jasper/chert

Chalcedony Pebble / Rough Agate (Silicon Dioxide (SiO2)) — mineral

Chalcedony Pebble / Rough Agate

Silicon Dioxide (SiO2)

Red Jasper (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

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

Red Jasper (Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Silicon dioxide (SiO2)) — mineral

Jasper

Silicon dioxide (SiO2)

Tree Agate (Dendritic Agate (Silicon Dioxide, SiO2 + Manganese/Iron oxides)) — mineral

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2 + Manganese/Iron oxides)

Moss Agate (Chalcedony (SiO2) with inclusions of hornblende or chlorite) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of hornblende or chlorite

Yellow Jasper (Silicon Dioxide (SiO2) with iron impurities) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Jasper with Quartz inclusions (Silicon Dioxide (SiO2) with varying mineral impurities) — sedimentary

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) with varying mineral impurities

Jasper with Quartz Vein (Microcrystalline quartz (SiO2) and chalcedony with a quartz vein) — sedimentary

Jasper with Quartz Vein

Microcrystalline quartz (SiO2) and chalcedony with a quartz vein

Agate Sliced Nodule (Silicon Dioxide (SiO2)) — mineral

Agate Sliced Nodule

Silicon Dioxide (SiO2)

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

Jasper

Silicon Dioxide (SiO2) with impurities

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

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Carnelian (a variety of Chalcedony) (Silicon Dioxide (SiO₂)) — Mineral

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO₂)

Carnelian (a variety of Chalcedony) (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) with Iron Oxide impurities) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) with Iron Oxide impurities