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
Category
Browse mineral (metal) specimens identified by the Rock Identifier community.
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
Quartz with inclusions (likely Tourmaline or Biotite)
Silicon Dioxide (SiO2)
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.)
Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)
Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon dioxide (SiO2)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
Gneiss
Metamorphic rock of high-grade regional metamorphism
Basalt with Mineral Vein (Cobble)
Basalt (with likely Quartz/Calcite vein)
Fossilized Bone Fragment
Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Fluorite (likely Fluorite on Quartz/Matrix)
Calcium Fluoride (CaF2)
Orthoclase Feldspar
Orthoclase (KAlSi₃O₈)
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Orange Calcite (likely polished specimen)
Calcite
Rutilated Quartz
Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Goethite/Limonite Iron Ore Node
Goethite (FeO(OH)) or Limonite (mixture of hydrated iron oxides)
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Turquoise with Pyrite
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
Mica Schist
Schist (primarily Muscovite and Biotite mica)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Sandstone (Ferruginous)
Arenite with Iron Oxides
Quartz / Quartzite
Silicon Dioxide (SiO2)
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
Satin Spar (often marketed as Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Calcite
Calcite (CaCO3)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Vesicular Basalt with Secondary Mineral Infill
Mafic Volcanic Rock (Basalt)
Granite
Granite (a common term for a felsic intrusive igneous rock)
Chrysocolla in Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)
Blue Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Quartz in Matrix
Silicon Dioxide (SiO2)
Limonite (also known as Yellow Ochre or Brown Hematite)
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
Blue Apatite
Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]