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

Corundum (Ruby Variety) (Corundum (Al2O3)) — mineral

Corundum (Ruby Variety)

Corundum (Al2O3)

Black Spinel (Magnesium Aluminum Oxide (MgAl2O4)) — mineral

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Nephrite Jade (Ca2(Mg, Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

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

Chert (Flint) River Pebble

Microcrystalline Quartz (SiO2)

Likely pink granite or granitic pegmatite fragment (Granite; mainly quartz (SiO₂), feldspar, and mica) — igneous

Likely pink granite or granitic pegmatite fragment

Granite; mainly quartz (SiO₂), feldspar, and mica

Chalcedony (Blue Agate Nodules) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Blue Agate Nodules)

Silicon Dioxide (SiO2)

Blue Sapphire (Raw) (Corundum (Al2O3)) — mineral

Blue Sapphire (Raw)

Corundum (Al2O3)

Fairburn Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Fairburn Agate

Cryptocrystalline Quartz (SiO2)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Star sapphire ring (Corundum (Al₂O₃), likely asteriated sapphire) — gemstone

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Conglomerate (Puddingstone) (Conglomerate (specifically, clastic sedimentary rock)) — Sedimentary

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Quartz-rich gravel fragment (Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions) — mineral

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

Gold (Gold (Native Element); Au) — mineral

Gold

Gold (Native Element); Au

Polished agate or chalcedony pebble (Microcrystalline quartz, SiO₂ (chalcedony; exact identification uncertain from the image)) — mineral

Polished agate or chalcedony pebble

Microcrystalline quartz, SiO₂ (chalcedony; exact identification uncertain from the image)

Gravel and River Pebbles (Unconsolidated rock fragments / Detrital sediment) — sedimentary

Gravel and River Pebbles

Unconsolidated rock fragments / Detrital sediment

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

Diamond

Diamond (pure Carbon, C)

Diamond (Blue Diamond) (Native Carbon (C)) — gemstone

Diamond (Blue Diamond)

Native Carbon (C)

Tumbled quartz-rich pebble, possibly calcite or quartzite (Most likely microcrystalline quartz (SiO₂); carbonate identification would require testing) — mineral

Tumbled quartz-rich pebble, possibly calcite or quartzite

Most likely microcrystalline quartz (SiO₂); carbonate identification would require testing

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Diamond (Natural Diamond (Carbon, C)) — gemstone

Diamond

Natural Diamond (Carbon, C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Rough Diamond (Diamond (Native Carbon, C)) — mineral

Rough Diamond

Diamond (Native Carbon, C)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Diamond (Lesedi La Rona specimen) (Diamond (Pure Carbon, C)) — mineral

Diamond (Lesedi La Rona specimen)

Diamond (Pure Carbon, C)

Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Blue Topaz (Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)) — mineral

Blue Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)

Nephrite Jade (Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2

Conglomerate (Conglomeratic Sandstone) — sedimentary

Conglomerate

Conglomeratic Sandstone

Diamond (Diamond (C)) — Mineral

Diamond

Diamond (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Ruby (Corundum (Al2O3 with Chromium traces)) — mineral

Ruby

Corundum (Al2O3 with Chromium traces)

Diamond (Cubic Carbon (C)) — mineral

Diamond

Cubic Carbon (C)

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

Diamond

Diamond (pure Carbon, C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)