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

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

Chalcedony / Agate Nodule

Silicon Dioxide (SiO2)

Amethyst Geode (Quartz (Silicon Dioxide, SiO2) with iron impurities) — mineral

Amethyst Geode

Quartz (Silicon Dioxide, SiO2) with iron impurities

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Carnelian Agate (Silicon Dioxide (Chalcedony variety)) — mineral

Carnelian Agate

Silicon Dioxide (Chalcedony variety)

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

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

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Blue Chalcedony (Silicon Dioxide (SiO2)) — gemstone

Blue Chalcedony

Silicon Dioxide (SiO2)

Carnelian Agate Beads (Silicon Dioxide (SiO2)) — gemstone

Carnelian Agate Beads

Silicon Dioxide (SiO2)

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

Turquoise

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

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Native Gold (in earring form) (Gold (Au)) — mineral

Native Gold (in earring form)

Gold (Au)

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode

Bamboo Leaf Jasper (Silicified Siltstone or Jasper (SiO2)) — sedimentary

Bamboo Leaf Jasper

Silicified Siltstone or Jasper (SiO2)

Quartz Geode with Calcite (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — Mineral/Geode

Quartz Geode with Calcite

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Specular Hematite (Polished Sphere) (Hematite (Alpha Fe2O3)) — mineral

Specular Hematite (Polished Sphere)

Hematite (Alpha Fe2O3)

Botryoidal Quartz (Silicon Dioxide (SiO2)) — mineral

Botryoidal Quartz

Silicon Dioxide (SiO2)

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

Banded Agate

Chalcedony (Silicon Dioxide, SiO2)

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

Jasper

Silicon Dioxide (SiO2) - Jasper (Microcrystalline Quartz)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Tumbled carnelian (Carnelian, orange-red variety of cryptocrystalline chalcedony (SiO₂)) — gemstone

Tumbled carnelian

Carnelian, orange-red variety of cryptocrystalline chalcedony (SiO₂)

Jasper (brecciated or orbicular jasper) (Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities) — mineral

Jasper (brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Red Jasper (Jasper (Silicon Dioxide, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Agate (specifically Lace Agate or Banded Agate) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically Lace Agate or Banded Agate)

Silicon Dioxide (SiO2)

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

Jasper

Silicon Dioxide (SiO2) with impurities

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

Jasper

Jasper / Silicon Dioxide (SiO₂)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Jasper (Jasper (Silicon Dioxide, SiO2 plus various impurities)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2 plus various impurities)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Limonite (Iron Ore) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Yellow Chalcedony or River Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chalcedony or River Jasper

Silicon Dioxide (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Opal (Hydrated Amorphous Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

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

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Red Jasper (Red Jasper (SiO2)) — sedimentary

Red Jasper

Red Jasper (SiO2)

Quartz on Host Rock (Silicon Dioxide (SiO2)) — Mineral Specimen

Quartz on Host Rock

Silicon Dioxide (SiO2)

Mineral Specimen

Jasper with Iron Staining (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Jasper with Iron Staining

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)