Rock Identifier

Category

Sedimentary (Volcanic)

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

Learn about Sedimentary (Volcanic) in the encyclopedia

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Conglomerate

Conglomerate

Andesite

Andesite

Quartzite Sandstone

Quartzite Sandstone

Pink Obsidian

Breccia

Breccia

Ironstone

Ironstone

Scoria

Scoria

Yellow Obsidian

Yellow Obsidian

Black Obsidian

Black Obsidian

Green Sheen Obsidian

Turquoise Obsidian

Teal Obsidian

Carnelian (Carnelian (microcrystalline variety of Quartz, SiO2)) — mineral

Carnelian

Carnelian (microcrystalline variety of Quartz, SiO2)

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

Chert / Jasper

Silicon Dioxide (SiO2)

sedimentary
Agate (Chert/Chalcedony) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Agate (Chert/Chalcedony)

Cryptocrystalline Quartz (SiO2)

sedimentary
Chalcedony (specifically Agate or Carnelian) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Agate or Carnelian)

Silicon Dioxide (SiO2)

mineral
Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)

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

Green Jasper

Silicon Dioxide (SiO2) with impurities

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

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

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

Carnelian (Agate)

Silicon Dioxide (SiO2)

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

Agate

Silicon Dioxide (Chalcedony variety), SiO2

gemstone
Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

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

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

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

Yellow Jasper

Silica (Silicon Dioxide, SiO2) with iron inclusions

sedimentary
Yellow Agate (Silicon Dioxide (SiO2)) — gemstone

Yellow Agate

Silicon Dioxide (SiO2)

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

Chert (Common Opal/Jasper variety)

Silicon Dioxide (SiO2)

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

Tumbled Agate (Dyed Blue)

Silicon Dioxide (Chalcedony variety)

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

Petrified Wood

Silicified Wood (SiO2)

sedimentary
Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)

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

Opal

Hydrated silicon dioxide (SiO2·nH2O)

gemstone
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)

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

Quartz (Druzy)

Silicon Dioxide (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

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

Jasper

Silicon Dioxide (SiO2)

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

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

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

Red Jasper

CHERT (SiO2) with Hematite impurities

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

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

mineral
Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Tumbled blue chalcedony (likely dyed)

Cryptocrystalline quartz, SiO₂; chalcedony variety

gemstone
Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

sedimentary
Agate (Chalcedony (SiO2)) — mineral

Agate

Chalcedony (SiO2)

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

Agate

Silicon dioxide (Chalcedony), SiO2

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

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

sedimentary
Jasper (Quartz (SiO2)) — sedimentary

Jasper

Quartz (SiO2)

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

Petrified Wood Fragment

Silicified Wood (SiO2)

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

Red Jasper

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

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

Yellow Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

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

Brecciated Agate / Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of cellulose)

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

Petrified Wood

Silicified Wood (SiO2)

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

Petrified Wood

Silicified Wood (SiO2)

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

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary