Rock Identifier

Category

Mineral, Often Found In Sedimentary Deposits

Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.

Opal (Hydrous silicon dioxide (SiO2·nH2O)) — mineral

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Petrified Wood (Silicified wood (principally Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (principally Silicon Dioxide, SiO2)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Native Copper Nugget (Native Copper (Cu)) — mineral

Native Copper Nugget

Native Copper (Cu)

Arsenopyrite in Quartz/Host Rock (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite in Quartz/Host Rock

Arsenopyrite (FeAsS)

Ferruginous Sandstone (Sandstone with iron oxide (Hematite/Limonite) cement) — sedimentary

Ferruginous Sandstone

Sandstone with iron oxide (Hematite/Limonite) cement

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Banded Jasper (possibly "Picture Jasper") (Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)) — Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)

Banded Jasper (possibly "Picture Jasper")

Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)

Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin) (Phylum Echinodermata, Class Echinoidea) — sedimentary

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)

Phylum Echinodermata, Class Echinoidea

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (primarily Quartz with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Iron Oxide)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (often referred to as Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)

Yellow Ochre / Limonite (Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)) — mineral

Yellow Ochre / Limonite

Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)

Gold-bearing Quartz (Native Gold (Au) in Quartz (SiO2) matrix) — mineral

Gold-bearing Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Chert (and Limestone) (Chert (consisting of Microcrystalline Quartz, SiO2)) — sedimentary

Chert (and Limestone)

Chert (consisting of Microcrystalline Quartz, SiO2)

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2) and Slate/Shale) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Hematite (Hematite (Fe2O3)) — Mineral

Hematite

Hematite (Fe2O3)

Quartz Vein in Sedimentary Matrix (Silicon Dioxide (SiO2) with host rock) — mineral

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Sandstone (Arenite (composed primarily of Quartz: SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Yellow Jasper (Silicon Dioxide (SiO2) with impurities of Iron or Goethite) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with impurities of Iron or Goethite

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

Fluorite (Green) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Green)

Fluorite (Calcium Fluoride, CaF2)

Pink Dyed Agate (Pink Agate Slice) (Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz) — mineral

Pink Dyed Agate (Pink Agate Slice)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Azurite in Matrix (Azurite (Cu3(CO3)2(OH)2)) — mineral

Azurite in Matrix

Azurite (Cu3(CO3)2(OH)2)

Limonite (Iron Ore/Hydrated Iron Oxide) (Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))) — Mineral

Limonite (Iron Ore/Hydrated Iron Oxide)

Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — Mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Caliche (with Lichen Cover) (Calcium carbonate-cemented soil layer (CaCO3)) — sedimentary

Caliche (with Lichen Cover)

Calcium carbonate-cemented soil layer (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Limonite (Limonite (Hydrated iron oxide mixture, FeO(OH)·nH2O)) — mineral

Limonite

Limonite (Hydrated iron oxide mixture, FeO(OH)·nH2O)

Fossilized Crinoid Stem Columnal (Phylum Echinodermata; Class Crinoidea (CaCO3)) — sedimentary

Fossilized Crinoid Stem Columnal

Phylum Echinodermata; Class Crinoidea (CaCO3)

Sandstone (Sandstone (lithified sand)) — sedimentary

Sandstone

Sandstone (lithified sand)

Malachite (Copper carbonate hydroxide, Cu2CO3(OH)2) — mineral

Malachite

Copper carbonate hydroxide, Cu2CO3(OH)2

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Limonite (Ironstone) (Hydrated Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite (Ironstone)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)