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

Weathered sandstone pebble (Quartz-rich sandstone, likely ferruginous litharenite) — sedimentary

Weathered sandstone pebble

Quartz-rich sandstone, likely ferruginous litharenite

Quartz pebble (Quartz (SiO2)) — sedimentary

Quartz pebble

Quartz (SiO2)

Pebble / Rounded Rock (Lithic fragment / Water-worn rock) — sedimentary

Pebble / Rounded Rock

Lithic fragment / Water-worn rock

Mixed River Pebbles (including Unakite and Jasper) (Polymineralic geological specimens) — igneous and sedimentary

Mixed River Pebbles (including Unakite and Jasper)

Polymineralic geological specimens

igneous and sedimentary

Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Likely water-worn gray pebble (Not identifiable to a specific rock from this image; possibly fine-grained basalt or another dark river-worn rock) — igneous

Likely water-worn gray pebble

Not identifiable to a specific rock from this image; possibly fine-grained basalt or another dark river-worn rock

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Quartz (Agate/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Agate/Chalcedony variety)

Silicon Dioxide (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz with Limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz with Limonite inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz River Stone (Silicon Dioxide (SiO2)) — sedimentary

Quartz River Stone

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Mixed River Stones and Minerals (Mixed Silica-rich Stones (Quartz, Agate, Jasper, Sandstone, Dalmation Stone)) — sedimentary

Mixed River Stones and Minerals

Mixed Silica-rich Stones (Quartz, Agate, Jasper, Sandstone, Dalmation Stone)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Basalt Pebble (Extrusive igneous rock) — igneous

Basalt Pebble

Extrusive igneous rock

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble with Iron Inclusions (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Milky Quartz Pebble with Iron Inclusions

Silicon Dioxide (SiO2) with iron oxide impurities

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Sand (Silicon Dioxide (SiO2)) — sedimentary

Quartz Sand

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

River Pebble (Greywacke / Basalt Pebble) (Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)) — sedimentary

River Pebble (Greywacke / Basalt Pebble)

Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

River Rock (Basalt or Sandstone) (Clastic Sedimentary Rock or Extrusive Mafic Igneous Rock) — igneous or sedimentary

River Rock (Basalt or Sandstone)

Clastic Sedimentary Rock or Extrusive Mafic Igneous Rock

igneous or sedimentary

Sandstone (Water-worn pebble) (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone (Water-worn pebble)

Sedimentary Rock (Quartz arenite)

Sandstone with Dendritic Inclusions (Quartzose Sandstone) — sedimentary

Sandstone with Dendritic Inclusions

Quartzose Sandstone

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Black Pebble (Basalt / Chert) (SiO2 (if Chert) or Mafic Igneous Rock (if Basalt)) — igneous

Black Pebble (Basalt / Chert)

SiO2 (if Chert) or Mafic Igneous Rock (if Basalt)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Agate

Silicon dioxide (Chalcedony), SiO2

Quartz Pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

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)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

River Pebble (Gneiss or Quartzite variant) (Metamorphic rock specimen (likely Quartzite or Gneiss)) — metamorphic

River Pebble (Gneiss or Quartzite variant)

Metamorphic rock specimen (likely Quartzite or Gneiss)