Rock Identifier

Category

Sedimentary (Alluvial Deposit)

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

Satin Spar (often marketed as Selenite) (Fibrous Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

Quartz (Iron-stained or Milky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)

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

Chert / Jasper

Microcrystalline Quartz (SiO2)

Bumblebee Jasper (Calcite with Arsenic and Manganese oxides (technically a volcanic rock)) — igneous

Bumblebee Jasper

Calcite with Arsenic and Manganese oxides (technically a volcanic rock)

Rough Star Sapphire (Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Smoky Quartz (Smoky Quartz (SiO2)) — mineral

Smoky Quartz

Smoky Quartz (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Conglomerate (Conglomerate (SiO2 matrix with various inclusions)) — sedimentary

Conglomerate

Conglomerate (SiO2 matrix with various inclusions)

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

Diamond

Diamond (pure Carbon, C)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

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

Diamond

Diamond (pure Carbon, C)

Jadeite (Jade) (NaAlSi2O6 (Sodium Aluminum Silicate)) — metamorphic

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Yellow Quartzite (River Pebble) (Silicon Dioxide (SiO2) with iron oxide inclusions) — metamorphic

Yellow Quartzite (River Pebble)

Silicon Dioxide (SiO2) with iron oxide inclusions

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Sapphire (Raw/Rough) (Corundum (Al2O3)) — mineral

Sapphire (Raw/Rough)

Corundum (Al2O3)

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

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Ruby (Corundum (Al2O3 with Chromium)) — mineral

Ruby

Corundum (Al2O3 with Chromium)

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

Ruby

Corundum (Al2O3) with Chromium traces

Conglomerate (Conglomerate (Sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary rock)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

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

Diamond

Diamond (pure carbon, C)

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

Blue Topaz (facetted in jewelry)

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

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

Yellow Quartz (Chalcedony/Citrine Pebble)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

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

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Carnelian (a variety of Chalcedony) (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Milky Quartz Pebble (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

White Topaz (Topaz [Al2SiO4(F,OH)2]) — mineral

White Topaz

Topaz [Al2SiO4(F,OH)2]

Quartz (Riverstone / Cobble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Riverstone / Cobble)

Silicon Dioxide (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Sapphire (Corundum) (Corundum (Al2O3)) — mineral

Sapphire (Corundum)

Corundum (Al2O3)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Ammonite Fossil (Ammonoidea (Calcium carbonate - CaCO3)) — sedimentary

Ammonite Fossil

Ammonoidea (Calcium carbonate - CaCO3)

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

Green Jade (specifically Nephrite)

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

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

Natural Gold Nugget

Native Gold (Au)

Chalcedony (Carnelian/Agate variety) (Silicon Dioxide (SiO2) with trace hematite/iron impurities) — mineral

Chalcedony (Carnelian/Agate variety)

Silicon Dioxide (SiO2) with trace hematite/iron impurities

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartzite Pebble (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartz (SiO2)

Aquamarine (Aquamarine (Beryl variety); Be3Al2Si6O18) — mineral

Aquamarine

Aquamarine (Beryl variety); Be3Al2Si6O18

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

Yellow Quartz Pebble

Silicon Dioxide (SiO2)