Rock Identifier

Category

Mineralized Fossil

Browse mineralized fossil specimens identified by the Rock Identifier community.

Learn about Mineralized Fossil in the encyclopedia

Fossil Opal

Fossil Opal

Bone Opal

Bone Opal

Turritella Jasper

Turritella Jasper

Amber

Amber

Fossiliferous Limestone

Fossiliferous Limestone

Turritella Agate

Turritella Agate

Petrified Wood

Petrified Wood

Diatomite

Diatomite

Guano

Guano

Jet

Jet

Diatomaceous Earth

Diatomaceous Earth

Opalized Wood

Opalized Wood

Blue Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Bumblebee Jasper (technically Bumblebee Stone) (Calcite, Aragonite, and Realgar/Orpiment mixture (SiO2 + CaCO3 + As2S3/As2S2)) — sedimentary (volcanic)

Bumblebee Jasper (technically Bumblebee Stone)

Calcite, Aragonite, and Realgar/Orpiment mixture (SiO2 + CaCO3 + As2S3/As2S2)

sedimentary (volcanic)

Limonite (Iron Ore) (Hydrated ferric oxide (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrated ferric oxide (FeO(OH)·nH2O)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Bauxite (Pisolitic Bauxite) (Bauxite (mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Greenstone (Epidote/Chlorite Rich Rock) (Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))) — metamorphic

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fluorite (likely Fluorite on Quartz/Matrix) (Calcium Fluoride (CaF2)) — mineral

Fluorite (likely Fluorite on Quartz/Matrix)

Calcium Fluoride (CaF2)

Orthoclase Feldspar (Orthoclase (KAlSi₃O₈)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz River Pebble with Algae (Silicon Dioxide (SiO2) with organic biofilm) — metamorphic or igneous

Quartz River Pebble with Algae

Silicon Dioxide (SiO2) with organic biofilm

metamorphic or igneous

Rough Quartz (Alluvial Pebbles) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (Alluvial Pebbles)

Silicon Dioxide (SiO2)

Greenstone with Epidote or Quartz veins (Metabasalt (Greenstone facies)) — metamorphic

Greenstone with Epidote or Quartz veins

Metabasalt (Greenstone facies)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Pink/Orange Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Pink/Orange Variety)

Silicon Dioxide (SiO2)

Chert (specifically Green Chert/Jasper) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (specifically Green Chert/Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Bumblebee Jasper (Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)) — sedimentary

Bumblebee Jasper

Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)

Quartz (Gravel fragment) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Gravel fragment)

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Lapis Lazuli (Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Lapis Lazuli (Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Pyrite-rich Ore (Pyrite (FeS2) with secondary minerals) — mineral

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

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

Malachite

Copper carbonate hydroxide, Cu2CO3(OH)2

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Ferruginous Sandstone (Gozzan) (Iron-rich clastic sedimentary rock with Limonite/Goethite) — sedimentary

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Selenite (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Arsenopyrite in Quartz Matrix (Arsenopyrite (FeAsS) with Quartz (SiO2)) — Mineral in a Metamorphic/Hydrothermal rock

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

Mineral in a Metamorphic/Hydrothermal rock

Gold Ore (Lode Gold) (Native Gold (Au) in Matrix) — mineral

Gold Ore (Lode Gold)

Native Gold (Au) in Matrix

Satin Spar (often marketed as Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Native Sulfur (Sulfur (S)) — mineral

Native Sulfur

Sulfur (S)

Red Sandstone (Arenite (predominantly Quartz with Hematite cementation)) — sedimentary

Red Sandstone

Arenite (predominantly Quartz with Hematite cementation)

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

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Turquoise (Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)

Red Sandstone (Arenite) — sedimentary

Red Sandstone

Arenite

Turquoise (Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O) — Mineral

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Petrified Wood (Silicified wood (Quartz, SiO2)) — metamorphic

Petrified Wood

Silicified wood (Quartz, SiO2)

Smoky Quartz (Silicon dioxide (SiO2)) — Mineral

Smoky Quartz

Silicon dioxide (SiO2)