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

Jasper pebble (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Jasper pebble

Silicon Dioxide (SiO2) with iron oxide impurities

Chert (Jasper/Agate variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Cryptocrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Milky quartz fragment (likely quartz-rich mineral)

Quartz, silicon dioxide (SiO₂)

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

Rough Diamond

Natural Diamond (Carbon, C)

Magnetite / Hematite (Iron Ore Pebble) (Fe3O4 (Magnetite) / Fe2O3 (Hematite)) — mineral

Magnetite / Hematite (Iron Ore Pebble)

Fe3O4 (Magnetite) / Fe2O3 (Hematite)

Basalt Pebble / Black River Stone (Aphanitic Mafic Igneous Rock (Basalt)) — igneous

Basalt Pebble / Black River Stone

Aphanitic Mafic Igneous Rock (Basalt)

Granite Cobble / Gneiss (River Rock) (Granitic Gneiss / Felsic Igneous Rock) — igneous

Granite Cobble / Gneiss (River Rock)

Granitic Gneiss / Felsic Igneous Rock

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

Rough Diamond

Diamond (Carbon, C)

Ruby (Corundum (Al2O3:Cr)) — gemstone

Ruby

Corundum (Al2O3:Cr)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Diamond (in jewelry setting) (Diamond (C - Pure Carbon)) — mineral

Diamond (in jewelry setting)

Diamond (C - Pure Carbon)

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

Diamond

Diamond (pure Carbon, C)

Diamond (Faceted Gemstone) (Native Carbon (C)) — mineral

Diamond (Faceted Gemstone)

Native Carbon (C)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

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

Rough Diamond

Diamond (pure Carbon, C)

Diamond (faceted) (Diamond (Pure Carbon, C)) — mineral

Diamond (faceted)

Diamond (Pure Carbon, C)

Diamond (in jewelry setting) (Adamantine Carbon (C)) — mineral

Diamond (in jewelry setting)

Adamantine Carbon (C)

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

Diamond

Diamond (pure Carbon, C)

Tumbled chalcedony pebble (Microcrystalline quartz (SiO₂), likely ferruginous or jasper-like chalcedony) — mineral

Tumbled chalcedony pebble

Microcrystalline quartz (SiO₂), likely ferruginous or jasper-like chalcedony

Colorless faceted gemstone, likely synthetic cubic zirconia (Cubic zirconia (zirconium dioxide, ZrO₂); natural diamond is a less likely alternative) — gemstone

Colorless faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); natural diamond is a less likely alternative

Sunstone (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — gemstone

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Diamond (Cullinan Heritage) (Carbon (C)) — mineral

Diamond (Cullinan Heritage)

Carbon (C)

Diamond (or Diamond Simulant) (Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

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

Diamond

Diamond (pure Carbon, C)

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

Nephrite Jade

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

Rough Diamond (Diamond (C)) — mineral

Rough Diamond

Diamond (C)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities and natural irradiation) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities and natural irradiation

Pink Quartzite Pebble (Meta-quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Pink Quartzite Pebble

Meta-quartzite (SiO2 with iron oxide inclusions)

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

Quartz Cobble (River Pebble)

Quartz (Silicon Dioxide - SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Diamond (in a jewelry setting) (Cubic Carbon (C)) — mineral

Diamond (in a jewelry setting)

Cubic Carbon (C)

Diamond (Princess Cut Faceted Gemstone) (Native Carbon (C)) — mineral

Diamond (Princess Cut Faceted Gemstone)

Native Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Quartzite (Milky Quartz Cobble) (Silicon Dioxide (SiO2)) — Metamorphic

Quartzite (Milky Quartz Cobble)

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

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

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

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

Ruby

Corundum (Al2O3 with Chromium traces)

Amber (Succinite) — mineral

Amber

Succinite

Painted Garden Rock (Coated Siltstone or Mudstone) — sedimentary

Painted Garden Rock

Coated Siltstone or Mudstone