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

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

Yellow Chalcedony / Carnelian

Silicon Dioxide (SiO2)

mineral
Brown Chalcedony (Agate/Jasper) (Cryptocrystalline Quartz (SiO2)) — mineral

Brown Chalcedony (Agate/Jasper)

Cryptocrystalline Quartz (SiO2)

mineral
Geode or Concretion (Silica-filled nodule (likely SiO2)) — sedimentary

Geode or Concretion

Silica-filled nodule (likely SiO2)

sedimentary
Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2) within a geode

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Chalcedony (Common Opal or Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal or Agate)

Silicon Dioxide (SiO2)

mineral
Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

mineral
Chalcedony (Agate/Carnelian type) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian type)

Silicon Dioxide (SiO2)

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

Jasper

Silicon dioxide (SiO2) with impurities

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

sedimentary
Eye Agate (Chalcedony (SiO2)) — sedimentary

Eye Agate

Chalcedony (SiO2)

sedimentary
Black Onyx (Chalcedony (SiO2)) — gemstone

Black Onyx

Chalcedony (SiO2)

gemstone
Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

sedimentary
Chalcedony (Agate/Jasper Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chalcedony (Agate/Jasper Nodule)

Silicon Dioxide (SiO2)

sedimentary
Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

sedimentary
Black Onyx (Chalcedony (SiO2)) — gemstone

Black Onyx

Chalcedony (SiO2)

gemstone
Agate Nodule (Chalcedony (SiO2)) — sedimentary

Agate Nodule

Chalcedony (SiO2)

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

Agate Nodule

Silicon dioxide (Chalcedony/Quartz), SiO2

sedimentary
Blue Chalcedony (Moonstone-like / Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — gemstone

Blue Chalcedony (Moonstone-like / Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

gemstone
Banded Agate (Silicon Dioxide (SiO2)) — mineral

Banded Agate

Silicon Dioxide (SiO2)

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

Green Jasper

Quartz (Silicon Dioxide, SiO2) with iron silicate inclusions

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

Chalcedony (Carnelian/Agate)

Silicon Dioxide (SiO2)

mineral
Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

sedimentary
Yellow Chalcedony (Carnelian / Agate Pebbles) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Carnelian / Agate Pebbles)

Silicon Dioxide (SiO2)

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

Agate (Chalcedony Nodule)

Silicon Dioxide (SiO2)

mineral
Rough Chalcedony / Jasper Nodules (Silicon Dioxide (SiO2)) — mineral

Rough Chalcedony / Jasper Nodules

Silicon Dioxide (SiO2)

mineral
Banded Agate (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Agate

Cryptocrystalline Quartz (SiO2)

sedimentary
Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

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

Agate (Carnelian type)

Silicon Dioxide (SiO2)

mineral
Amethyst Geode Fragment (Quartz (SiO2) with trace iron impurities) — mineral

Amethyst Geode Fragment

Quartz (SiO2) with trace iron impurities

mineral
Mixed Gemstone and Mineral Collection (Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)) — mineral

Mixed Gemstone and Mineral Collection

Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

mineral
Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

mineral
Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)

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

Blue Chalcedony

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Quartz Geode (Quartz (Silicon Dioxide, SiO2) in a Geode) — sedimentary

Quartz Geode

Quartz (Silicon Dioxide, SiO2) in a Geode

sedimentary
Turquoise (Turquoise, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary
Yellow Jasper (within host rock) (Silicon Dioxide (SiO2) with iron hydroxides (Goethite)) — sedimentary

Yellow Jasper (within host rock)

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

sedimentary