Mineral (Synthetic)

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

Limonite Concretion (Ironstone)

Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)

sedimentary

Limonite (vibrant yellowish-brown iron oxide)

Limonite (FeO(OH)·nH2O)

mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated Iron Oxide)

mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

mineral

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

sedimentary

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

metamorphic

Quartz (Druzy)

Silicon Dioxide (SiO2)

mineral

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) - Macro-crystalline Quartz

mineral

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

metamorphic

Granite

Granite (Felsic intrusive igneous rock)

igneous

Lapis Lazuli

Na6Ca2(Al6Si6O24)(S,SO4,Cl)1-2 (primarily containing Lazurite with inclusions of Calcite and Pyrite)

metamorphic

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

metamorphic

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Combined Minerals / Metaphysical stones

Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)

Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)

mineral

Quartz Geode

Silicon dioxide (SiO2)

mineral

Pyrite

Iron Sulfide (FeS2)

mineral

Green Fluorite

Calcium Fluoride (CaF2)

mineral

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Metamorphic, likely Sedimentary with Quartz veins

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

mineral

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

igneous

Gneiss

Metamorphic rock of high-grade regional metamorphism

metamorphic

Basalt with Mineral Vein (Cobble)

Basalt (with likely Quartz/Calcite vein)

Igneous

Fossilized Bone Fragment

Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)

sedimentary

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

mineral

Fluorite (likely Fluorite on Quartz/Matrix)

Calcium Fluoride (CaF2)

mineral

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

mineral

Lapis Lazuli

Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

metamorphic

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral

Orange Calcite (likely polished specimen)

Calcite

Mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)

mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

mineral

Pegmatite with Schorl (Black Tourmaline) and Mica

Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)

igneous

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

mineral

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

mineral

Goethite/Limonite Iron Ore Node

Goethite (FeO(OH)) or Limonite (mixture of hydrated iron oxides)

mineral

Turquoise with Pyrite

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)

mineral

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

igneous

Mica Schist

Schist (primarily Muscovite and Biotite mica)

metamorphic

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

mineral

Sandstone (Ferruginous)

Arenite with Iron Oxides

sedimentary