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

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Black Sapphire (Corundum (Al2O3 with inclusions of hematite or ilmenite)) — mineral

Black Sapphire

Corundum (Al2O3 with inclusions of hematite or ilmenite)

Tumbled yellow chalcedony (Microcrystalline quartz (SiO₂), likely yellow chalcedony or low-grade citrine-like quartz) — mineral

Tumbled yellow chalcedony

Microcrystalline quartz (SiO₂), likely yellow chalcedony or low-grade citrine-like quartz

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

Raw quartz crystal (Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz) — mineral

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Amber (Succinite) — Organic (Mineraloid)

Amber

Succinite

Organic (Mineraloid)

Yellow Quartzite Pitting Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Yellow Quartzite Pitting Pebble

Metamorphic Quartzite (SiO2)

Quartz-rich breccia or conglomerate (Siliciclastic conglomerate/breccia, predominantly quartz and feldspar clasts in a rusty iron-oxide cement) — sedimentary

Quartz-rich breccia or conglomerate

Siliciclastic conglomerate/breccia, predominantly quartz and feldspar clasts in a rusty iron-oxide cement

Arkosic Sandstone (Arkose) — sedimentary

Arkosic Sandstone

Arkose

Conglomerate (River Rock Aggregate) (Conglomerate (Lithic-clast conglomerate)) — sedimentary

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

Conglomerate (Conglomerate (Clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Clastic sedimentary rock)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag) (Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)) — sedimentary

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Conglomeratic sandstone or breccia (Lithic arkose / polymictic conglomeratic sandstone) — sedimentary

Conglomeratic sandstone or breccia

Lithic arkose / polymictic conglomeratic sandstone

Tumbled chalcedony (likely brown-yellow jasper or agate) (Microcrystalline quartz (SiO₂), chalcedony variety) — mineral

Tumbled chalcedony (likely brown-yellow jasper or agate)

Microcrystalline quartz (SiO₂), chalcedony variety

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Red cabochon gemstone, likely carnelian (Carnelian: orange-red chalcedony, microcrystalline quartz (SiO₂)) — gemstone

Red cabochon gemstone, likely carnelian

Carnelian: orange-red chalcedony, microcrystalline quartz (SiO₂)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Corundum (Sapphire in Matrix) (Aluminum Oxide (Al2O3)) — mineral

Corundum (Sapphire in Matrix)

Aluminum Oxide (Al2O3)

Spinel (Magnesium aluminum oxide (MgAl2O4)) — gemstone

Spinel

Magnesium aluminum oxide (MgAl2O4)

Yellow Jade (Nephrite or Quartzite variety) (Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite) / SiO2 (Quartzite variant)) — metamorphic

Yellow Jade (Nephrite or Quartzite variety)

Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite) / SiO2 (Quartzite variant)

Native Gold Nugget (Native Gold (Au)) — mineral

Native Gold Nugget

Native Gold (Au)

Ruby (varieties of Corundum) (Aluminum oxide (Al2O3) with Chromium traces) — mineral

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

General Gravel (River Rock/River Stones) (Mixed Lithic Sediments (Conglomerate Clasts)) — sedimentary

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Conglomerate (Sedimentary Conglomerate) — sedimentary

Conglomerate

Sedimentary Conglomerate

River gravel and cobbles (Mixed alluvial clasts, likely including granite, basalt, quartzite, and sandstone) — sedimentary

River gravel and cobbles

Mixed alluvial clasts, likely including granite, basalt, quartzite, and sandstone

Exposed Aggregate Concrete (Pea Gravel) (Concrete with Siliceous Alluvial Gravels) — sedimentary (man-made conglomerate)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

sedimentary (man-made conglomerate)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Diamond (Cut Gemstone) (Carbon (C)) — gemstone

Diamond (Cut Gemstone)

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Citrine Quartz / Yellow Quartz Pebbles (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz / Yellow Quartz Pebbles

Silicon Dioxide (SiO2)

Diamond (in jewelry) (Element Carbon (C)) — mineral

Diamond (in jewelry)

Element Carbon (C)

Yellow Quartz (Citrine or Quartzite Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Diamond (Diamond (pure carbon, C)) — mineral

Diamond

Diamond (pure carbon, C)

Diamond (or Cubic Zirconia) (Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ) — mineral

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ