Rock Identifier

Category

Mineralological Variety

Browse mineralological variety specimens identified by the Rock Identifier community.

Learn about Mineralological Variety in the encyclopedia

Albite

Flame Obsidian

Lace Obsidian

Oligoclase

Brookite

Sodalite

Syenite

Microcline

Leopard Obsidian

Orthoclase

Starry Night Obsidian

Pumpkin Obsidian

Pumpkin Obsidian

Jasper (Chalcedony (SiO2)) — mineral

Jasper

Chalcedony (SiO2)

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — sedimentary or metamorphic

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

sedimentary or metamorphic

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Satin Spar (often marketed as Selenite) (Fibrous Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

Brown chalcedony (likely agate) (Microcrystalline quartz, SiO₂; chalcedony, possibly banded agate) — mineral

Brown chalcedony (likely agate)

Microcrystalline quartz, SiO₂; chalcedony, possibly banded agate

Brown flint (chert) (Microcrystalline quartz (SiO₂), likely iron-stained flint) — sedimentary

Brown flint (chert)

Microcrystalline quartz (SiO₂), likely iron-stained flint

Small reddish-brown pebble, possibly jasper or iron-stained quartz (Unidentified silica-rich pebble; visual identification is insufficient to distinguish jasper, quartz, or another material) — mineral

Small reddish-brown pebble, possibly jasper or iron-stained quartz

Unidentified silica-rich pebble; visual identification is insufficient to distinguish jasper, quartz, or another material

Green tumbled agate (likely green chalcedony) (Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo) — mineral

Green tumbled agate (likely green chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo

Tumbled chalcedony (likely brown agate) (Chalcedony, microcrystalline quartz (SiO₂); possibly agate) — mineral

Tumbled chalcedony (likely brown agate)

Chalcedony, microcrystalline quartz (SiO₂); possibly agate

Polished pink-orange chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; carnelian is orange-red chalcedony) — mineral

Polished pink-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; carnelian is orange-red chalcedony

Tumbled carnelian (Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Tumbled carnelian

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Amethyst cluster (Amethyst, purple quartz (SiO₂)) — mineral

Amethyst cluster

Amethyst, purple quartz (SiO₂)

Amethyst (likely tumbled or polished) (Quartz, SiO₂; purple color commonly caused by trace iron and natural irradiation) — mineral

Amethyst (likely tumbled or polished)

Quartz, SiO₂; purple color commonly caused by trace iron and natural irradiation

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Gypsum (desert rose and selenite) (Gypsum, CaSO₄·2H₂O; the left specimen resembles a desert rose, the right a selenite crystal) — mineral

Gypsum (desert rose and selenite)

Gypsum, CaSO₄·2H₂O; the left specimen resembles a desert rose, the right a selenite crystal

Serpentine (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Red-orange sunstone (likely aventurine feldspar) bead bracelet (Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source) — mineral

Red-orange sunstone (likely aventurine feldspar) bead bracelet

Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (Tiger Eye variety transition) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Tiger Eye variety transition)

Silicon Dioxide (SiO2) with iron oxide inclusions

Serpentinite (Serpentinite (Hydrous magnesium iron phyllosilicate)) — metamorphic

Serpentinite

Serpentinite (Hydrous magnesium iron phyllosilicate)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Tumbled Citrine (Silicon Dioxide (Quartz variety)) — mineral

Tumbled Citrine

Silicon Dioxide (Quartz variety)

Brecciated jasper (Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia) — sedimentary

Brecciated jasper

Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia

Brown chalcedony (agate-like flint/chert fragment) (Chalcedony, microcrystalline quartz (SiO₂); identification is tentative from the photo) — mineral

Brown chalcedony (agate-like flint/chert fragment)

Chalcedony, microcrystalline quartz (SiO₂); identification is tentative from the photo

Icy Jadeite (Jade Bangle) (Jadeite, NaAlSi2O6 (Pyroxene group)) — gemstone

Icy Jadeite (Jade Bangle)

Jadeite, NaAlSi2O6 (Pyroxene group)

Likely selenite (gypsum) crystal (Gypsum, CaSO₄·2H₂O; variety likely satin spar or fibrous selenite) — mineral

Likely selenite (gypsum) crystal

Gypsum, CaSO₄·2H₂O; variety likely satin spar or fibrous selenite

Satin Spar (Satin Spar Selenite) (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (Satin Spar Selenite)

Gypsum (CaSO4·2H2O)

Polished brown jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides and other impurities) — sedimentary

Polished brown jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides and other impurities

Satin Spar (often marketed as Selenite) (Fibrous Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

Chert (Nodular Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodular Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Tumbled Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled Quartz

Silicon Dioxide (SiO2)

Polished jasper pebble (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions) — mineral

Polished jasper pebble

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Polished brecciated jasper (Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay-mineral inclusions) — gemstone

Polished brecciated jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay-mineral inclusions

Satin Spar (Selenite) (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar (Selenite)

Gypsum (CaSO4·2H2O)

Iron-stained chert (possible jasper) (Microcrystalline quartz (SiO₂), likely iron-oxide stained) — sedimentary

Iron-stained chert (possible jasper)

Microcrystalline quartz (SiO₂), likely iron-oxide stained

Sapphire (Corundum variety) (Sapphire (Al₂O₃)) — Mineral

Sapphire (Corundum variety)

Sapphire (Al₂O₃)