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

Chert (and Jasper/Chalcedony mixture) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Carnelian (Agate)

Silicon Dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2 with Hematite inclusions)

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

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Red Jasper (Chalcedony (SiO2) with iron inclusions) — sedimentary

Red Jasper

Chalcedony (SiO2) with iron inclusions

Quartz Geode (Silicon Dioxide (SiO2) within a geode) — mineral

Quartz Geode

Silicon Dioxide (SiO2) within a geode

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

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

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary/mineral

Agate (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony variety), SiO2

Tumbled Agate (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Quartz Druze on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Yellow Agate (Silicon Dioxide (SiO2)) — gemstone

Yellow Agate

Silicon Dioxide (SiO2)

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

Yellow Jasper

Silica (Silicon Dioxide, SiO2) with iron inclusions

Chert (Common Opal/Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Common Opal/Jasper variety)

Silicon Dioxide (SiO2)

Tumbled Agate (Dyed Blue) (Silicon Dioxide (Chalcedony variety)) — gemstone

Tumbled Agate (Dyed Blue)

Silicon Dioxide (Chalcedony variety)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

Opal (Hydrated silicon dioxide (SiO2·nH2O)) — gemstone

Opal

Hydrated silicon dioxide (SiO2·nH2O)

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils) (Trace fossil in microcrystalline quartz (SiO2)) — fossil

Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)

Trace fossil in microcrystalline quartz (SiO2)

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Jasper

Silicon Dioxide (SiO2)

sedimentary/mineral

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)) — mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Chalcedony Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Red Jasper (CHERT (SiO2) with Hematite impurities) — sedimentary

Red Jasper

CHERT (SiO2) with Hematite impurities

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Tumbled blue chalcedony (likely dyed) (Cryptocrystalline quartz, SiO₂; chalcedony variety) — gemstone

Tumbled blue chalcedony (likely dyed)

Cryptocrystalline quartz, SiO₂; chalcedony variety

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Agate (Chalcedony (SiO2)) — mineral

Agate

Chalcedony (SiO2)

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

Agate

Silicon dioxide (Chalcedony), SiO2

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

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Jasper (Quartz (SiO2)) — sedimentary

Jasper

Quartz (SiO2)

Petrified Wood Fragment (Silicified Wood (SiO2)) — fossil

Petrified Wood Fragment

Silicified Wood (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities

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

Yellow Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Brecciated Agate / Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Brecciated Agate / Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of cellulose)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions