Rock Identifier

Category

Sedimentary (Volcanic)

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

Learn about Sedimentary (Volcanic) in the encyclopedia

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Andesite

Pink Obsidian

Breccia

Ironstone

Scoria

Yellow Obsidian

Yellow Obsidian

Black Obsidian

Green Sheen Obsidian

Turquoise Obsidian

Teal Obsidian

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)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Vesicular basalt with secondary zeolite/mineral crusts (Basalt, chiefly plagioclase–pyroxene ± olivine; cavities partly filled by zeolites or calcite) — igneous

Vesicular basalt with secondary zeolite/mineral crusts

Basalt, chiefly plagioclase–pyroxene ± olivine; cavities partly filled by zeolites or calcite

Polished Ocean Jasper (likely orbicular jasper) (Microcrystalline quartz/chalcedony (SiO₂) with iron oxides and other accessory minerals) — sedimentary

Polished Ocean Jasper (likely orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron oxides and other accessory minerals

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

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

Jasper-Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Agate Nodule / Chalcedony

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Crazy Lace Agate (Silicon Dioxide (SiO2) with iron and aluminum inclusions) — sedimentary

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Agate (SiO2 (Chalcedony/Quartz)) — sedimentary

Agate

SiO2 (Chalcedony/Quartz)

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

Agate

Silicon dioxide (Chalcedony), SiO2

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions

Orbicular Rhyolite (Rainforest Jasper) (Rhyolite containing Spherulites (SiO2 with impurities)) — igneous

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

Porphyritic basaltic-andesite cobble (Fine-grained plagioclase–pyroxene volcanic rock, likely basaltic andesite) — igneous

Porphyritic basaltic-andesite cobble

Fine-grained plagioclase–pyroxene volcanic rock, likely basaltic andesite

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

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Red Jasper (with Chert/Quartz) (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper (with Chert/Quartz)

Silicon Dioxide (SiO2)

Jasper (likely Iron-stained) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (likely Iron-stained)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

Picture Jasper (Silicon Dioxide (SiO2) with iron oxide and clay impurities) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Tumbled jasper (likely brown/yellow jasper) (Microcrystalline quartz, SiO₂, typically with iron-oxide and clay impurities) — mineral

Tumbled jasper (likely brown/yellow jasper)

Microcrystalline quartz, SiO₂, typically with iron-oxide and clay impurities

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone (Uncertain; likely Fe-oxide/hydroxide–stained mafic rock (hematite Fe₂O₃, goethite FeO(OH), and silicates)) — igneous

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Uncertain; likely Fe-oxide/hydroxide–stained mafic rock (hematite Fe₂O₃, goethite FeO(OH), and silicates)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Tumbled orange-brown jasper (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — mineral

Tumbled orange-brown jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Polished red-brown jasper or jasper-rich agate (Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide inclusions) — mineral

Polished red-brown jasper or jasper-rich agate

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide inclusions

Polished brecciated jasper (Jasper, microcrystalline quartz (SiO₂), with iron-oxide and dark mineral inclusions) — gemstone

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and dark mineral inclusions

Polished red jasper beads (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper beads

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Moss Agate (Silicon Dioxide with inclusions (SiO2 + impurities)) — mineral

Moss Agate

Silicon Dioxide with inclusions (SiO2 + impurities)

Native Sulfur (Sulfur (S)) — mineral

Native Sulfur

Sulfur (S)

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

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geode

Tumbled brown stone, possibly jasper or weathered chert (Uncertain; likely microcrystalline quartz (SiO₂), potentially iron-stained jasper/chert) — mineral

Tumbled brown stone, possibly jasper or weathered chert

Uncertain; likely microcrystalline quartz (SiO₂), potentially iron-stained jasper/chert

Black-and-white jasper (Jasper, microcrystalline quartz (SiO₂), with contrasting white mineral inclusions) — metamorphic

Black-and-white jasper

Jasper, microcrystalline quartz (SiO₂), with contrasting white mineral inclusions

Picture Jasper (Silicified volcanic tuff and jasper; chiefly microcrystalline quartz (SiO₂)) — sedimentary

Picture Jasper

Silicified volcanic tuff and jasper; chiefly microcrystalline quartz (SiO₂)

Tumbled jasper, likely brown/red jasper (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — mineral

Tumbled jasper, likely brown/red jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Tumbled jasper (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral impurities) — mineral

Tumbled jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral impurities

Tumbled red jasper (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Polished yellow-brown jasper (Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing iron-oxide impurities) — mineral

Polished yellow-brown jasper

Jasper, a microcrystalline variety of quartz (SiO₂), commonly containing iron-oxide impurities

Tumbled jasper or chalcedony (Microcrystalline quartz (SiO₂), likely brown jasper/chalcedony) — mineral

Tumbled jasper or chalcedony

Microcrystalline quartz (SiO₂), likely brown jasper/chalcedony

Red jasper (likely brecciated or orbicular jasper) (Microcrystalline quartz, SiO₂, colored mainly by iron oxides) — mineral

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Red jasper (likely rough jasper/chert) (Microcrystalline quartz (SiO₂), commonly colored by iron oxides) — mineral

Red jasper (likely rough jasper/chert)

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Quartz Geode (Crystalline Silica (SiO2)) — mineral

Quartz Geode

Crystalline Silica (SiO2)