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

Fluorite with Quartz coating (Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)) — mineral

Fluorite with Quartz coating

Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Fluorite (Calcium fluoride, CaF2) — Mineral

Fluorite

Calcium fluoride, CaF2

Apatite (Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Apatite

Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Schist (Schist) — metamorphic

Schist

Schist

Quartz geode (Microcrystalline and crystalline quartz (SiO₂), likely chalcedony-lined geode) — mineral

Quartz geode

Microcrystalline and crystalline quartz (SiO₂), likely chalcedony-lined geode

Chrysocolla (Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Sandstone (Arenite (SiO2 principal composition)) — sedimentary

Sandstone

Arenite (SiO2 principal composition)

Petrified Wood / Fossilized Wood (Silicified Wood (Silicon Dioxide - SiO2)) — fossil

Petrified Wood / Fossilized Wood

Silicified Wood (Silicon Dioxide - SiO2)

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

Limonite (Iron Ore)

FeO(OH)·nH2O

Black Sand (Magnetite Sand) (Magnetite (Fe3O4)) — mineral

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

Gneiss (Metamorphic Gneiss (High-grade regional metamorphism)) — metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Galena (Lead sulfide (PbS)) — mineral

Galena

Lead sulfide (PbS)

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

Limonite (Iron Ore)

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

Iron Ore (Limonite and Hematite) (Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)) — mineral

Iron Ore (Limonite and Hematite)

Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Carved serpentine wing sculpture (Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4) — metamorphic

Carved serpentine wing sculpture

Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4

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

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Silver Nuggets (Natural or Cast) (Native Silver (Ag)) — mineral

Silver Nuggets (Natural or Cast)

Native Silver (Ag)

Quartz Geode (Silicon Dioxide (SiO2) in Geodic Cavity) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in Geodic Cavity

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

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

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Cobaltian Calcite (Cobalt-bearing Calcite (Ca,Co)CO3) — mineral

Cobaltian Calcite

Cobalt-bearing Calcite (Ca,Co)CO3

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

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Biotite-rich gneiss (probable) (Foliated quartz–feldspar–biotite gneiss; composition commonly includes quartz (SiO₂), feldspar, and biotite mica) — metamorphic

Biotite-rich gneiss (probable)

Foliated quartz–feldspar–biotite gneiss; composition commonly includes quartz (SiO₂), feldspar, and biotite mica

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Green glassy slag or manufactured glass bead (Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral) — mineral

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Quartz-rich Diorite (Diorite (Phaneritic intermediate igneous rock)) — igneous

Quartz-rich Diorite

Diorite (Phaneritic intermediate igneous rock)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Granite fragment (Granite (Felsic intrusive igneous rock)) — igneous

Granite fragment

Granite (Felsic intrusive igneous rock)

Gneiss (High-grade Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (High-grade Metamorphic Rock)

Gneiss

Granite (Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss (Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Native Copper in Basalt (Cuprum (with Host Basalt)) — igneous

Native Copper in Basalt

Cuprum (with Host Basalt)

Gneiss (High-grade Metamorphic Gneiss) — metamorphic

Gneiss

High-grade Metamorphic Gneiss