Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Learn about Mineral Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Morganite Crystal

Morganite Crystal

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Quartz with Iron Oxide Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz with Iron Oxide Inclusions

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2)) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Peacock Ore (Bornite (Cu5FeS4) with surface tarnish) — mineral

Peacock Ore

Bornite (Cu5FeS4) with surface tarnish

Likely pale green fluorite crystals (Fluorite (calcium fluoride, CaF₂)) — mineral

Likely pale green fluorite crystals

Fluorite (calcium fluoride, CaF₂)

Aquamarine (Tumbled) (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine (Tumbled)

Beryl (Be3Al2Si6O18)

Small rounded pebble, possibly quartz-rich stone (Indeterminate from image; likely quartz-bearing silicate rock) — mineral

Small rounded pebble, possibly quartz-rich stone

Indeterminate from image; likely quartz-bearing silicate rock

Quartz crystal cluster (Quartz (silicon dioxide, SiO₂)) — mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Beryl (Aquamarine) in Matrix with Schorl (Be3Al2Si6O18 (Beryl) with NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)) — mineral

Beryl (Aquamarine) in Matrix with Schorl

Be3Al2Si6O18 (Beryl) with NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Quartz crystal cluster in iron-stained matrix (Quartz (SiO₂), likely a drusy or small-vein crystal coating; exact host rock is unclear from the photo) — mineral

Quartz crystal cluster in iron-stained matrix

Quartz (SiO₂), likely a drusy or small-vein crystal coating; exact host rock is unclear from the photo

Carnelian (orange chalcedony) (Cryptocrystalline quartz, SiO₂; orange variety of chalcedony) — gemstone

Carnelian (orange chalcedony)

Cryptocrystalline quartz, SiO₂; orange variety of chalcedony

Agate (Carnelian Agate with Quartz Matrix) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian Agate with Quartz Matrix)

Silicon Dioxide (SiO2)

Amethyst Cluster (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst Cluster

Silicon Dioxide (SiO2) with iron impurities

Ocean Jasper (Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)) — sedimentary

Ocean Jasper

Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)

Green Fluorite (Botryoidal/Massive) (Calcium Fluoride (CaF2)) — mineral

Green Fluorite (Botryoidal/Massive)

Calcium Fluoride (CaF2)

Mixed mineral and crystal specimens (Likely quartz varieties and other common minerals; exact identification is uncertain from the image) — mineral

Mixed mineral and crystal specimens

Likely quartz varieties and other common minerals; exact identification is uncertain from the image

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite

Prehnite (Ca2Al(AlSi3O10)(OH)2) — mineral

Prehnite

Ca2Al(AlSi3O10)(OH)2

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Raw rose quartz (Quartz, silicon dioxide (SiO₂), pink variety) — mineral

Raw rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Orange Calcite (Iron-Stained) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Iron-Stained)

Calcium Carbonate (CaCO3)

Muscovite Mica Schist (Metamorphic Rock (Muscovite-Biotite Schist)) — metamorphic

Muscovite Mica Schist

Metamorphic Rock (Muscovite-Biotite Schist)

Small brown mineral/rock fragment (Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral) — mineral

Small brown mineral/rock fragment

Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral

Clear quartz crystal (Quartz (SiO₂), likely a small hexagonal prismatic crystal) — mineral

Clear quartz crystal

Quartz (SiO₂), likely a small hexagonal prismatic crystal

Botryoidal chalcedony/geode fragment (Chalcedony, microcrystalline quartz (SiO₂), likely iron-oxide coated) — mineral

Botryoidal chalcedony/geode fragment

Chalcedony, microcrystalline quartz (SiO₂), likely iron-oxide coated

Rose quartz (rough fragment) (Quartz, silicon dioxide (SiO₂), pink variety) — mineral

Rose quartz (rough fragment)

Quartz, silicon dioxide (SiO₂), pink variety

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Fuchsite (Green Muscovite / Mica Schist) (Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite (Green Muscovite / Mica Schist)

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Pyrite Nodule (Iron Sulfide (FeS2)) — mineral

Pyrite Nodule

Iron Sulfide (FeS2)

Amethyst (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

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

Quartz (Granular)

Silicon Dioxide (SiO2)

Schorl (Black Tourmaline) in Quartz/Feldspar Matrix (NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)) — mineral

Schorl (Black Tourmaline) in Quartz/Feldspar Matrix

NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Druzy quartz on matrix (Quartz (SiO₂), microcrystalline crystal coating) — mineral

Druzy quartz on matrix

Quartz (SiO₂), microcrystalline crystal coating

Black tumbled stone, possibly black tourmaline (Uncertain from the image; possibly schorl tourmaline, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) — mineral

Black tumbled stone, possibly black tourmaline

Uncertain from the image; possibly schorl tourmaline, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Tumbled amethyst (Amethyst, purple quartz (SiO₂)) — gemstone

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Smoky quartz (likely citrine/iron-stained quartz) (Quartz, SiO₂; coloration from irradiation and/or iron impurities) — mineral

Smoky quartz (likely citrine/iron-stained quartz)

Quartz, SiO₂; coloration from irradiation and/or iron impurities

Aquamarine (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Fuchsite (Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2) — mineral

Fuchsite

Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2

Carnelian (Silicon Dioxide (Chalcedony variety), SiO2) — mineral

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

Red Jasper (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions