Rock Identifier

Category

Sedimentary (Volcanic)

Browse sedimentary (volcanic) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Volcanic) in the encyclopedia

Conglomerate

Andesite

Quartzite Sandstone

Quartzite Sandstone

Pink Obsidian

Breccia

Ironstone

Scoria

Yellow Obsidian

Yellow Obsidian

Black Obsidian

Green Sheen Obsidian

Turquoise Obsidian

Teal Obsidian

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

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

Jasper

Silicon dioxide (SiO2) with iron oxide impurities

Geode (Unopened) (Silicon Dioxide (SiO2) in sedimentary vugs) — sedimentary

Geode (Unopened)

Silicon Dioxide (SiO2) in sedimentary vugs

Fancy Jasper (Silicon Dioxide (SiO2)) — sedimentary

Fancy Jasper

Silicon Dioxide (SiO2)

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

Chalcedony (Yellow Agate/Chert)

Silicon Dioxide (SiO2)

Chert (varieties: Flint or Chalcedony) (Microcrystalline silica (SiO2)) — sedimentary

Chert (varieties: Flint or Chalcedony)

Microcrystalline silica (SiO2)

Chalcedony (Common Agate pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

Orpiment (Orpiment (As2S3)) — mineral

Orpiment

Orpiment (As2S3)

Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Carnelian (SiO2 (Chalcedony with iron oxide impurities)) — mineral

Carnelian

SiO2 (Chalcedony with iron oxide impurities)

Chalcedony (Moonstone-like Agate) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Moonstone-like Agate)

Silicon Dioxide (SiO₂)

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

Red Jasper with Quartz

Silicon Dioxide (SiO2)

Chert (Chalcedony/Agate variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Seashell replacement) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony (Agate/Seashell replacement)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Agate with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

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

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz Geode (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

Satin Spar Selenite (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Calcium Sulfate Dihydrate (CaSO4·2H2O)

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

Red Jasper (Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Red Jasper (Brecciated Jasper)

SiO2 (Silicon Dioxide) with Ferric Iron inclusions

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

Agate Nodule / Weathered Agate

Silicon Dioxide (Chalcedony / Quartz, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Chalcedony (likely agate/chert variety) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (likely agate/chert variety)

Microcrystalline quartz, SiO₂

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Weathered iron-rich rock, possibly basalt or ironstone (Uncertain; likely weathered basalt (plagioclase–pyroxene) or hematite/goethite-bearing ironstone) — igneous

Weathered iron-rich rock, possibly basalt or ironstone

Uncertain; likely weathered basalt (plagioclase–pyroxene) or hematite/goethite-bearing ironstone

Hematite (Iron oxide (Fe2O3)) — mineral

Hematite

Iron oxide (Fe2O3)

Carnelian Agate (Silicon Dioxide (SiO2)) — gemstone

Carnelian Agate

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Tumbled Red Jasper (Quartz (Microcrystalline variety of chalcedony, SiO2)) — mineral

Tumbled Red Jasper

Quartz (Microcrystalline variety of chalcedony, SiO2)

Green Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Green Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Pink Opal (Hydrated amorphous silica (SiO2·nH2O)) — gemstone

Pink Opal

Hydrated amorphous silica (SiO2·nH2O)

Tumbled Red Jasper (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Tumbled Red Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Jasper (Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

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

Jasper

Microcrystalline Quartz (Chalcedony), SiO2