Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

Browse igneous or sedimentary (water worn) specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary (Water Worn) in the encyclopedia

Water Opal

Enhydro Quartz

Carbonatite

Clear Beryl

Ice Opal

Hyalite Opal

Iolite

Conglomerate

Jelly Opal

Clear Obsidian

Coldwater Agate

Clear Tourmaline

Clear Tourmaline

Beach Pebble (Basalt/Greywacke) (Amygdaloidal Basalt) — igneous

Beach Pebble (Basalt/Greywacke)

Amygdaloidal Basalt

River Pebble (Quartzite / Sandstone) (SiO2 (Quartz-rich sedimentary/metamorphic rock)) — sedimentary

River Pebble (Quartzite / Sandstone)

SiO2 (Quartz-rich sedimentary/metamorphic rock)

Gabbro (Water-worn Pebble) (Phaneritic Mafic Igneous Rock) — igneous

Gabbro (Water-worn Pebble)

Phaneritic Mafic Igneous Rock

Green Aventurine (Silicon dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Green Aventurine

Silicon dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Granite Pebble (Intrusive Igneous Rock (Granite)) — igneous

Granite Pebble

Intrusive Igneous Rock (Granite)

Stream-Rounded Shale or Mudstone (Argillaceous sedimentary rock) — sedimentary

Stream-Rounded Shale or Mudstone

Argillaceous sedimentary rock

River Pebble (Siltstone/Mudstone) (Clastic sedimentary rock) — sedimentary

River Pebble (Siltstone/Mudstone)

Clastic sedimentary rock

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Chert (often called Flint when dark) (Sedimentary cryptocrystalline quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Sedimentary cryptocrystalline quartz (SiO2)

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

Jasper (Red/Yellow Jasper Pebble)

Silicon Dioxide (SiO2 with Iron Oxide inclusions)

Granite Pebble (Intrusive Igneous Rock) — igneous

Granite Pebble

Intrusive Igneous Rock

Pebble (likely Siltstone or fine-grained Sandstone) (Sedimentary Clastic Rock) — sedimentary

Pebble (likely Siltstone or fine-grained Sandstone)

Sedimentary Clastic Rock

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt Pebble (Aphanitic mafic extrusive igneous rock) — igneous

Basalt Pebble

Aphanitic mafic extrusive igneous rock

Basalt pebble (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt pebble

Basalt (Mafic Extrusive Igneous Rock)

Apache Tear (Obsidian) (Obsidian (Si02 - Amorphous Silicate)) — igneous

Apache Tear (Obsidian)

Obsidian (Si02 - Amorphous Silicate)

Basalt (River Rock Cobble) (Extrusive mafic volcanic rock (Basalt)) — igneous

Basalt (River Rock Cobble)

Extrusive mafic volcanic rock (Basalt)

River Cobble (likely Basalt or Rhyolite) (Extrusive Igneous Rock (Mafic or Intermediate)) — igneous

River Cobble (likely Basalt or Rhyolite)

Extrusive Igneous Rock (Mafic or Intermediate)

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

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Basalt (Weathered) (Mafic Igneous Rock) — igneous

Basalt (Weathered)

Mafic Igneous Rock

Chert (Jasper) Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper) Pebble

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

River Cobble (Basalt or Greywacke) (Extrusive Mafic Igneous Rock (likely Basalt)) — igneous

River Cobble (Basalt or Greywacke)

Extrusive Mafic Igneous Rock (likely Basalt)

Vesicular Basalt (Basalt with secondary mineral infills) — igneous

Vesicular Basalt

Basalt with secondary mineral infills

Granite River Pebble (Granite) — igneous

Granite River Pebble

Granite

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Basalt (Basalt) — igneous

Basalt

Basalt

Gray Pebble (Graywacke / Basalt) (Graywacke (or fine-grained Basalt)) — sedimentary

Gray Pebble (Graywacke / Basalt)

Graywacke (or fine-grained Basalt)

Chert with Quartz Veining (Microcrystalline silica (SiO2)) — sedimentary

Chert with Quartz Veining

Microcrystalline silica (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Rounded quartz pebble (Quartz, crystalline silica (SiO₂), likely milky quartz) — mineral

Rounded quartz pebble

Quartz, crystalline silica (SiO₂), likely milky quartz

Milky Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Conglomerate (Clastic sedimentary rock (composed mostly of SiO2)) — sedimentary

Conglomerate

Clastic sedimentary rock (composed mostly of SiO2)

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

Jasper

Silicon dioxide (SiO2) with impurities

Quartz Pebble (Crystalline Silica (SiO2)) — sedimentary

Quartz Pebble

Crystalline Silica (SiO2)