Granite
Granite
igneous
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock with secondary mineral infilling)
igneous
Schist with Biotite and Quartz
Biotite-Quartz Schist (Fe,Mg,Al silicate mix)
metamorphic
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Limonite (Iron Stone/Gossen)
Limonite (FeO(OH)·nH2O)
mineral
Limonite
Limonite (Hydrated iron oxide mixture, FeO(OH)·nH2O)
mineral
Granite
Granite
igneous
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sulfur on Quartz
Native Sulfur (S8) with Quartz (SiO2)
mineral
Garden Quartz (Lodalite)
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
mineral
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Granite or Pegmatite with Mica
Granitoid
igneous
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Chrysocolla
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·n(H2O)
mineral
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
mineral
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
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
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
Quartz with inclusions (likely Tourmaline or Biotite)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Basalt with Mineral Vein (Cobble)
Basalt (with likely Quartz/Calcite vein)
Igneous
Gneiss
Metamorphic rock of high-grade regional metamorphism
metamorphic
Fossilized Bone Fragment
Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)
sedimentary