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

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

Quartz / Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Banded Agate (Tumbled Pebble) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Tumbled Pebble)

Silicon Dioxide (SiO2)

Black Onyx (Chalcedony (Silicon Dioxide - SiO2)) — mineral

Black Onyx

Chalcedony (Silicon Dioxide - SiO2)

Quartz with Calcite / Geode Fragment (Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)) — mineral

Quartz with Calcite / Geode Fragment

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

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

Banded Agate (Carnelian-Agate)

Silicon Dioxide (SiO2)

Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony

Cryptocrystalline Quartz (SiO2)

Chalcedony (Tumbled) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Tumbled)

Cryptocrystalline Quartz (SiO2)

Agate (Chalcedony SiO2) — mineral

Agate

Chalcedony SiO2

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

Jasper

Silicon Dioxide (SiO2) with impurities

Specular Hematite (Hematite (Iron(III) oxide, Fe2O3)) — mineral

Specular Hematite

Hematite (Iron(III) oxide, Fe2O3)

Polished Agate Geode (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Polished Agate Geode

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Gray Chalcedony Gemstone (Chalcedony (SiO2)) — mineral

Gray Chalcedony Gemstone

Chalcedony (SiO2)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2)

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

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Turquoise in Matrix (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise in Matrix

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

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

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2) with iron/clay inclusions

Green Quartz (Prasiolite/Adventurine) (Silicon Dioxide with inclusions (SiO2)) — mineral

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

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

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Blue Chalcedony (Chalcedony (SiO2)) — mineral

Blue Chalcedony

Chalcedony (SiO2)

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

Chalcedony (Agate)

Silicon Dioxide (SiO2)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Carnelian (Chalcedony (SiO2 with Iron Oxide inclusions)) — mineral

Carnelian

Chalcedony (SiO2 with Iron Oxide inclusions)

Carnelian (a variety of Chalcedony) (SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)) — mineral

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)

Red Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Red Carnelian

Carnelian (Silicon Dioxide - SiO2)

Pumice (Pumice (extrusive volcanic glass)) — igneous

Pumice

Pumice (extrusive volcanic glass)

Agate (SiO2 (Chalcedony/Quartz)) — sedimentary

Agate

SiO2 (Chalcedony/Quartz)

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

Agate

Silicon dioxide (Chalcedony), SiO2

Agate / Chalcedony (Silicon dioxide (SiO2)) — mineral

Agate / Chalcedony

Silicon dioxide (SiO2)

Yellow Jasper / Chalcedony (Silicon Dioxide (SiO2) with iron inclusions) — mineral

Yellow Jasper / Chalcedony

Silicon Dioxide (SiO2) with iron inclusions

Polished orbicular jasper (Orbicular jasper; microcrystalline quartz (SiO₂) with hematite/goethite and other silicate inclusions) — sedimentary

Polished orbicular jasper

Orbicular jasper; microcrystalline quartz (SiO₂) with hematite/goethite and other silicate inclusions

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Silicon Dioxide (SiO2) microcrystalline quartz variety) — sedimentary

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz variety

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Carnelian (SiO2 (Variety of Chalcedony)) — gemstone

Carnelian

SiO2 (Variety of Chalcedony)

Carnelian (SiO2 (Silicon dioxide)) — mineral

Carnelian

SiO2 (Silicon dioxide)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

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

Quartz (Agate/Chalcedony)

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)