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

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Basalt Pebble (Aphanitic mafic extrusive igneous rock) — igneous

Basalt Pebble

Aphanitic mafic extrusive igneous rock

River Cobble (Diorite or Meta-volcanic with Quartz Veining) (Diorite (with SiO2 quartz veins)) — igneous

River Cobble (Diorite or Meta-volcanic with Quartz Veining)

Diorite (with SiO2 quartz veins)

River Stone (Basalt Porphyry) (Porphyritic Basalt) — igneous

River Stone (Basalt Porphyry)

Porphyritic Basalt

Granite Pebble (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

Chert Pebble (with Quartz Vein) (Silicon Dioxide (SiO2)) — sedimentary

Chert Pebble (with Quartz Vein)

Silicon Dioxide (SiO2)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chalcedony (Yellow/Brown Agate Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Yellow/Brown Agate Pebble)

Silicon Dioxide (SiO2)

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

Carnelian / Chalcedony

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Pink/Red variety) (Felsic Intrusive Igneous Rock) — igneous

Granite (Pink/Red variety)

Felsic Intrusive Igneous Rock

Tumbled Slate or Basalt Pebble (Metamorphic fine-grained rock / Slate or Phyllite) — metamorphic

Tumbled Slate or Basalt Pebble

Metamorphic fine-grained rock / Slate or Phyllite

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

Quartz (Quartz Pebble)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Polished dark pebble, possibly basalt or chert (Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or microcrystalline silica (chert)) — igneous

Polished dark pebble, possibly basalt or chert

Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or microcrystalline silica (chert)

Quartz Geode (Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Water-worn)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Common River Pebbles and Stones (Mixed natural stream gravel / siliciclastic pebbles) — sedimentary

Common River Pebbles and Stones

Mixed natural stream gravel / siliciclastic pebbles

Pebble (Lithified rock fragment / Sedimentary clast) — sedimentary

Pebble

Lithified rock fragment / Sedimentary clast

Sandstone Pebble (Ventifact) (Arenite (mostly SiO2)) — sedimentary

Sandstone Pebble (Ventifact)

Arenite (mostly SiO2)

Chert (River Pebble) (Microcrystalline silica (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline silica (SiO2)

River Stone (Greywacke) (Greywacke (immature sandstone)) — sedimentary

River Stone (Greywacke)

Greywacke (immature sandstone)

Wishing Stone (Sandstone with Quartz Vein) (Arenite with Quartzite intrusion (SiO₂)) — sedimentary

Wishing Stone (Sandstone with Quartz Vein)

Arenite with Quartzite intrusion (SiO₂)

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

Yellow Jasper (Chert)

Silicon Dioxide (SiO2)

Quartz Pebble (Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

River Pebbles and Cobbles (Polymictic Gravel / Water-worn Lithic Fragments) — sedimentary

River Pebbles and Cobbles

Polymictic Gravel / Water-worn Lithic Fragments

Banded gneissic rock (Gneiss, likely quartz–feldspar–biotite gneiss) — metamorphic

Banded gneissic rock

Gneiss, likely quartz–feldspar–biotite gneiss

Yellow Jasper (Jasper (SiO2) with iron hydroxide inclusions) — sedimentary

Yellow Jasper

Jasper (SiO2) with iron hydroxide inclusions

Jasper and Basalt Pebble (Polymineralic lithic pebble) — igneous and sedimentary

Jasper and Basalt Pebble

Polymineralic lithic pebble

igneous and sedimentary

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Worn River Pebble with Fossil Indentation (Sedimentary Rock with Fossil Infill) — sedimentary

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Diorite (River Cobble) (Diorite (Intrusive Igneous Rock)) — igneous

Diorite (River Cobble)

Diorite (Intrusive Igneous Rock)

Garnet (Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Basalt (Porphyritic) (Porphyritic Basalt) — igneous

Basalt (Porphyritic)

Porphyritic Basalt

Beach Agate / Jasper Pebble (Cryptocrystalline Quartz (SiO2)) — sedimentary

Beach Agate / Jasper Pebble

Cryptocrystalline Quartz (SiO2)