Rock Identifier

Category

Mineral Pseudomorph

Browse mineral pseudomorph specimens identified by the Rock Identifier community.

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Diamond (Diamond (Pure Carbon - C)) — mineral

Diamond

Diamond (Pure Carbon - C)

Gold and Diamond (Native Gold (Au) and Diamond (C)) — mineral

Gold and Diamond

Native Gold (Au) and Diamond (C)

Raw Diamond (Carbon (C)) — mineral

Raw Diamond

Carbon (C)

Quartz (Water-worn Pebble) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz (Water-worn Pebble)

Quartz (Silicon Dioxide, SiO2)

Sodalite Syenite (popularly known as Yooperlite) (Sodalite-rich Syenite (composed of alkali feldspar and sodalite)) — Igneous

Sodalite Syenite (popularly known as Yooperlite)

Sodalite-rich Syenite (composed of alkali feldspar and sodalite)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Granite (Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Greenstone (Epidote/Chlorite-rich Metabasalt) (Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Magnetite / Hematite mix (Iron Ore) (Fe3O4 (Magnetite) / Fe2O3 (Hematite)) — mineral

Magnetite / Hematite mix (Iron Ore)

Fe3O4 (Magnetite) / Fe2O3 (Hematite)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Magnetite / Iron Ore (Magnetite (Fe3O4)) — mineral

Magnetite / Iron Ore

Magnetite (Fe3O4)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Garnet (Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3) — Mineral

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Garnet Schist (Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)) — metamorphic

Garnet Schist

Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)

Garnet-Bearing Gneiss (Almandine-Garnet Gneiss) — metamorphic

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Hag Stone (Perforated Sedimentary Rock (typically Limestone or Sandstone)) — sedimentary

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Gossan with Copper Carbonate (Chrysocolla/Malachite) (Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)) — Mineral/Sedimentary Interface

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Mineral/Sedimentary Interface

Granite (Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)) — igneous

Granite

Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

Prehnite on Basalt (Prehnite - Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite on Basalt

Prehnite - Ca2Al(AlSi3O10)(OH)2

Chrysocolla on Quartz (Chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O) often associated with Quartz (SiO2)) — mineral

Chrysocolla on Quartz

Chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O) often associated with Quartz (SiO2)

Moss Agate (Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite) — Mineral (variety of Chalcedony)

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite

Mineral (variety of Chalcedony)

Kimberlite (Kimberlite) — igneous

Kimberlite

Kimberlite

N/A (The provided image is a storyboard/digital document) — N/A

N/A (The provided image is a storyboard/digital document)

Sandstone (with potential iron-oxide staining) (Arenite (primarily SiO2)) — sedimentary

Sandstone (with potential iron-oxide staining)

Arenite (primarily SiO2)

Snowflake Obsidian (Volcanic glass containing Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Cristobalite (SiO2)

Iron Meteorite (Individual) (Siderite (composed of Kamacite and Taenite minerals)) — igneous

Iron Meteorite (Individual)

Siderite (composed of Kamacite and Taenite minerals)

Dalmation Stone (Peralkaline Rock (mixed silicate minerals)) — igneous

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Ammonite Fossil (Polished Section) (Ammonoidea (typically mineralized with Calcite CaCO3)) — sedimentary

Ammonite Fossil (Polished Section)

Ammonoidea (typically mineralized with Calcite CaCO3)

Greenschist (Greenstone) (Greenschist) — metamorphic

Greenschist (Greenstone)

Greenschist

Granite (including Pegmatite variants) (Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)) — Igneous

Granite (including Pegmatite variants)

Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)

Shale or Argillite (Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)) — Sedimentary or Metamorphic (low grade)

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)

Sandstone (Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

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

Gneiss

Gneiss (High-grade Metamorphic Rock)

Sandstone (Arenite (predominantly SiO2)) — sedimentary

Sandstone

Arenite (predominantly SiO2)

Greenschist (Greenstone River Pebble) (Greenschist (Chlorite Schist)) — metamorphic

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)