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

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)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Flint / Chert Pebble (Microcrystalline quartz (SiO2)) — sedimentary

Flint / Chert Pebble

Microcrystalline quartz (SiO2)

Flint (Silicon dioxide (SiO2) microcrystalline quartz) — sedimentary

Flint

Silicon dioxide (SiO2) microcrystalline quartz

Jasper / Chert (River Pebble) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper / Chert (River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (and/or Siltstone River Pebble) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (and/or Siltstone River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

River Stone (likely Siltstone or fine-grained Quartzite) (Sedimentary clastic rock containing SiO2 and iron oxides) — sedimentary

River Stone (likely Siltstone or fine-grained Quartzite)

Sedimentary clastic rock containing SiO2 and iron oxides

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Conglomerate (Clastic Sedimentary Rock (Conglomerate)) — sedimentary

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Fine-grained gray-green pebble (Likely lithic sandstone or siltstone; exact identification is not possible from the image alone) — sedimentary

Fine-grained gray-green pebble

Likely lithic sandstone or siltstone; exact identification is not possible from the image alone

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

$Jasper pebble with vein quartz cross-cutting fractures (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary$

Jasper pebble with vein quartz cross-cutting fractures

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Chert (Commonly known as Flint or River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Commonly known as Flint or River Pebble)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon dioxide (SiO2) with impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal/Tumbled Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal/Tumbled Agate)

Silicon Dioxide (SiO2)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Ferruginous Sandstone Pebble (Iron-rich Clastic Sedimentary Rock) — sedimentary

Ferruginous Sandstone Pebble

Iron-rich Clastic Sedimentary Rock

Basalt pebble (Aphanitic Mafic Volcanic Rock (Fe/Mg rich)) — igneous

Basalt pebble

Aphanitic Mafic Volcanic Rock (Fe/Mg rich)

Basalt Pebble (Basalt (Mafic Volcanic Rock)) — igneous

Basalt Pebble

Basalt (Mafic Volcanic Rock)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Granite (Phaneritic Igneous Rock) (Granite) — igneous

Granite (Phaneritic Igneous Rock)

Granite

Porphyritic Rhyolite (Rhyolite (Porphyry)) — igneous

Porphyritic Rhyolite

Rhyolite (Porphyry)

Carnelian Agate/Jasper blend (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Carnelian Agate/Jasper blend

Silicon Dioxide (SiO2) - variety of Chalcedony

Water-worn limestone and calcite-rich stones (Limestone, chiefly calcite (CaCO₃), with possible dolomite and minor iron-oxide staining) — sedimentary

Water-worn limestone and calcite-rich stones

Limestone, chiefly calcite (CaCO₃), with possible dolomite and minor iron-oxide staining

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Hag Stone (Perforated Chert (Microcrystalline Silica, SiO2)) — sedimentary

Hag Stone

Perforated Chert (Microcrystalline Silica, SiO2)

Chert (specifically Cryptocrystalline Quartz) (Silicon dioxide (SiO2)) — sedimentary

Chert (specifically Cryptocrystalline Quartz)

Silicon dioxide (SiO2)

Jasper with Quartz Vein (Microcrystalline quartz (SiO2) with quartz infill) — sedimentary

Jasper with Quartz Vein

Microcrystalline quartz (SiO2) with quartz infill

Pebble with Basaltic and Quartz-rich Banding (Polymictic Lithic Pebble) — sedimentary

Pebble with Basaltic and Quartz-rich Banding

Polymictic Lithic Pebble

Chert Nodules in Sedimentary Rock (Microcrystalline Quartz (SiO2) within Clastic Matrix) — sedimentary

Chert Nodules in Sedimentary Rock

Microcrystalline Quartz (SiO2) within Clastic Matrix

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

Conglomerate

Clastic sedimentary rock (composed mostly of SiO2)

Black river pebble, likely basalt (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine) — igneous

Black river pebble, likely basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine

Chert (Lake Superior Agate variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Lake Superior Agate variant)

Microcrystalline Quartz (SiO2)

White quartz pebble (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Pebble) (Arenite) — sedimentary

Sandstone (Pebble)

Arenite

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)