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

Red Jasper (Silicon Dioxide with Iron Oxide (SiO2)) — mineral

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2)

Sulfur (with Matrix) (Native Sulfur (S8)) — mineral

Sulfur (with Matrix)

Native Sulfur (S8)

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Bumblebee Jasper (Carbonate-rich volcanic sediment with arsenic and sulfur inclusions) — sedimentary

Bumblebee Jasper

Carbonate-rich volcanic sediment with arsenic and sulfur inclusions

Orbicular jasper (likely ocean jasper) (Silicified microcrystalline quartz/chalcedony, commonly called Ocean Jasper; predominantly SiO₂ with iron-oxide inclusions) — sedimentary

Orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony, commonly called Ocean Jasper; predominantly SiO₂ with iron-oxide inclusions

Red Moss Agate (Jasper) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Moss Agate (Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Jasper (Red and Tan Jasper) (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Red and Tan Jasper)

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Volcanic tuff and basalt outcrop (Welded volcanic tuff, with probable basaltic lava/scoria) — igneous

Volcanic tuff and basalt outcrop

Welded volcanic tuff, with probable basaltic lava/scoria

Jasper (likely Polychrome or Ocean Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (likely Polychrome or Ocean Jasper)

Silicon Dioxide (SiO2) with impurities

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper (SiO2) — mineral

Yellow Jasper

SiO2

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

Carnelian / Agate

Silicon Dioxide (SiO2) - Chalcedony

Green Jasper / Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Green Jasper / Chert

Microcrystalline Quartz (SiO2)

Geode (Silicon dioxide (Quartz/Chalcedony) concretion) — sedimentary

Geode

Silicon dioxide (Quartz/Chalcedony) concretion

Chalcedony (Silicon Dioxide (SiO2)) — mineral

Chalcedony

Silicon Dioxide (SiO2)

Black Onyx (Chalcedony (SiO2)) — gemstone

Black Onyx

Chalcedony (SiO2)

Jasper Beads (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Beads

Microcrystalline Quartz (SiO2)

Banded Agate with Drusy Quartz (Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz) — mineral

Banded Agate with Drusy Quartz

Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz

Agate (Cryptocrystalline quartz (SiO2)) — mineral

Agate

Cryptocrystalline quartz (SiO2)

Agate (Agate (Cryptocrystalline Quartz)) — mineral

Agate

Agate (Cryptocrystalline Quartz)

Grey Chalcedony (Tumbled Moon) (Microcrystalline Quartz (SiO2)) — mineral

Grey Chalcedony (Tumbled Moon)

Microcrystalline Quartz (SiO2)

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

Chalcedony (Quartz)

Silicon Dioxide (SiO2)

Conglomeratic breccia (possibly polymictic volcanic breccia) (Polymictic breccia; clasts in a fine-grained volcanic or sedimentary matrix) — igneous

Conglomeratic breccia (possibly polymictic volcanic breccia)

Polymictic breccia; clasts in a fine-grained volcanic or sedimentary matrix

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

Green Jasper

Silicon Dioxide (SiO2) with impurities

Bumblebee Jasper (Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)) — sedimentary

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Jasper Agate (Cryptocrystalline quartz, SiO2) — mineral

Jasper Agate

Cryptocrystalline quartz, SiO2

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

Chalcedony (Common Opal variant or Agate pebble)

Silicon dioxide (SiO2)

Jasper (Silicon dioxide (SiO2) with iron inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron inclusions

Red Jasper and Green Aventurine (Silicon dioxide (SiO2)) — mineral

Red Jasper and Green Aventurine

Silicon dioxide (SiO2)

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

Carnelian / Chalcedony

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Agate and Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Chalcedony (Agate/Chert) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Yellow Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Red jasper pebble (probable) (Jasper, opaque microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Red jasper pebble (probable)

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

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Conglomerate (Clast-supported polymict conglomerate) — sedimentary

Conglomerate

Clast-supported polymict conglomerate

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)