Rock Identifier

Category

Sedimentary (Alluvial Deposit)

Browse sedimentary (alluvial deposit) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Alluvial Deposit) in the encyclopedia

Turbidite

Sapropel

Rock Gypsum

Yellow Quartz (SiO2 (Crystalline Silicon Dioxide)) — mineral

Yellow Quartz

SiO2 (Crystalline Silicon Dioxide)

Quartz (Yellow/Milky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow/Milky variety)

Silicon Dioxide (SiO2)

Rounded gravel / river pebbles (Polymictic alluvial gravel, commonly quartz-, feldspar-, and lithic-rich clasts) — sedimentary

Rounded gravel / river pebbles

Polymictic alluvial gravel, commonly quartz-, feldspar-, and lithic-rich clasts

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

Yellow Chalcedony / Carnelian

Silicon Dioxide (SiO2)

Yellow Jasper (Chalcedony (SiO2) with iron oxide inclusions) — mineral

Yellow Jasper

Chalcedony (SiO2) with iron oxide inclusions

River Cobble (Sandstone or Greywacke) (Arenite / Greywacke) — sedimentary

River Cobble (Sandstone or Greywacke)

Arenite / Greywacke

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Stream-rounded Cobble) (Arenite (composed primarily of SiO2, Silica)) — sedimentary

Sandstone (Stream-rounded Cobble)

Arenite (composed primarily of SiO2, Silica)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Crushed Stone / Gravel (Aggregate (mixed lithology)) — sedimentary

Crushed Stone / Gravel

Aggregate (mixed lithology)

Jasper Conglomerate (Clastic Sedimentary Rock (Conglomeratic Quartzite)) — sedimentary

Jasper Conglomerate

Clastic Sedimentary Rock (Conglomeratic Quartzite)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Gold-bearing Quartz / Auriferous River Rock (Lode Gold in Quartz Matrix (SiO2 + Au)) — sedimentary

Gold-bearing Quartz / Auriferous River Rock

Lode Gold in Quartz Matrix (SiO2 + Au)

Pebble (Lithified clastic rock fragment / Quartz-rich pebble) — sedimentary

Pebble

Lithified clastic rock fragment / Quartz-rich pebble

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Sand (Silicon Dioxide (SiO2)) — sedimentary

Quartz Sand

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

River Pebble (Quartzo-feldspathic rock fragment) — sedimentary

River Pebble

Quartzo-feldspathic rock fragment

Hematoid Quartz (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Hematoid Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Rounded river gravel (mixed alluvial pebbles) (Polymictic alluvial gravel; commonly composed of quartzite, granite, basalt, sandstone, and quartz) — sedimentary

Rounded river gravel (mixed alluvial pebbles)

Polymictic alluvial gravel; commonly composed of quartzite, granite, basalt, sandstone, and quartz

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Zebra Stone (Silicified Siltstone) (Silicified Siltstone with Quartz/Kaolinite inclusions) — sedimentary

Zebra Stone (Silicified Siltstone)

Silicified Siltstone with Quartz/Kaolinite inclusions

Siltstone Pebble (Siltstone) — sedimentary

Siltstone Pebble

Siltstone

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Yellow Sapphire (Pukhraj) (Corundum (Al2O3)) — gemstone

Yellow Sapphire (Pukhraj)

Corundum (Al2O3)

Quartz (Rose or Milky variety fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Yellow Chalcedony (Quartz Pebble)

Silicon Dioxide (SiO2)

Breccia (Sedimentary Breccia) — sedimentary

Breccia

Sedimentary Breccia

Conglomerate (Conglomerate (Clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Clastic sedimentary rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Mixed rounded river pebbles (Polymictic alluvial gravel; likely quartz/quartzite, chert, and weathered feldspathic rocks) — sedimentary

Mixed rounded river pebbles

Polymictic alluvial gravel; likely quartz/quartzite, chert, and weathered feldspathic rocks

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Mixed Tumbled Rocks and Minerals Collection (Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)) — mineral

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Gold Mineral (Native Gold (Au)) — mineral

Gold Mineral

Native Gold (Au)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Weathered sandstone (probable arkosic sandstone) (Clastic sandstone, mainly quartz (SiO₂) with feldspar and iron-oxide cement) — sedimentary

Weathered sandstone (probable arkosic sandstone)

Clastic sandstone, mainly quartz (SiO₂) with feldspar and iron-oxide cement

Garden Pebble (Quartzite or Limestone fragment) (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) fragment) — sedimentary

Garden Pebble (Quartzite or Limestone fragment)

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) fragment

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

River Cobble (Quartz-rich Sandstone) (Arenite with iron oxide staining) — sedimentary

River Cobble (Quartz-rich Sandstone)

Arenite with iron oxide staining