Rock Identifier

Category

Mineral (Pseudomorph)

Browse mineral (pseudomorph) specimens identified by the Rock Identifier community.

Learn about Mineral (Pseudomorph) in the encyclopedia

Pineapple Opal

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Copper Ore (Malachite and Azurite stained rock) (Copper-bearing rock with secondary copper carbonates) — mineral

Copper Ore (Malachite and Azurite stained rock)

Copper-bearing rock with secondary copper carbonates

Dinosaur Bone (Agatized Dinosaur Bone) — sedimentary/fossil

Dinosaur Bone

Agatized Dinosaur Bone

sedimentary/fossil

Yellow Aventurine (Quartz with inclusion minerals (SiO2)) — mineral

Yellow Aventurine

Quartz with inclusion minerals (SiO2)

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

Limonite / Ironstone

Hydrated Iron Oxide (FeO(OH)·nH2O)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Unidentified gray stone (Likely quartz-rich stone; exact identification is not possible from the image) — mineral

Unidentified gray stone

Likely quartz-rich stone; exact identification is not possible from the image

Quartzite Pebble (with mineral veining) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble (with mineral veining)

Metamorphic Quartzite (SiO2)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

White quartz pebble (Quartz (SiO₂), likely milky quartz) — mineral

White quartz pebble

Quartz (SiO₂), likely milky quartz

Limonite / Ironstone Concretion (Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)) — sedimentary

Limonite / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)

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

Limonite (Yellow Ochre)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Limonite Concretion (FeO(OH)·nH2O (Hydrated Iron Oxide)) — sedimentary

Limonite Concretion

FeO(OH)·nH2O (Hydrated Iron Oxide)

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

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Limonite (Ironstone Concretion) (Limonite: FeO(OH)·nH2O) — sedimentary

Limonite (Ironstone Concretion)

Limonite: FeO(OH)·nH2O

Limonite (Iron Ore) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Yellow Ochre / Limonite (Limonite (FeO(OH)·nH2O)) — Mineral

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Orthoclase Feldspar (Potassium aluminum silicate (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

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

Limonite

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

Bauxite (Bauxite (Al2O3·2H2O mixed with iron oxides)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O mixed with iron oxides)

Ironstone Concretion (Moqui Marble / Boji Stone) (Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))) — sedimentary

Ironstone Concretion (Moqui Marble / Boji Stone)

Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Picture Sandstone) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

Sandstone (with banding) (Arenite (primarily SiO2)) — sedimentary

Sandstone (with banding)

Arenite (primarily SiO2)

Native Copper (Penny specimen) (Native Copper (Cu)) — mineral

Native Copper (Penny specimen)

Native Copper (Cu)

Cubic Zirconia (Faceted) (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Sandstone (Arenite (SiO2 dominant)) — sedimentary

Sandstone

Arenite (SiO2 dominant)

Sandstone (Banded) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limonite (Iron Ore) (Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Red Calcite (Calcium Carbonate (CaCO3)) — mineral

Red Calcite

Calcium Carbonate (CaCO3)

Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Dyed Quartz Geode (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Banded Agate (Silicon dioxide (SiO2) - variety of Chalcedony) — sedimentary

Banded Agate

Silicon dioxide (SiO2) - variety of Chalcedony

Snowflake Obsidian (Obsidian with Cristobalite inclusions (SiO2)) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Botryoidal Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Gossanous Sandstone (likely Terrestrial) (Arenite with Iron-Oxide inclusions) — sedimentary

Gossanous Sandstone (likely Terrestrial)

Arenite with Iron-Oxide inclusions