Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Category
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Quartz
Silicon Dioxide (SiO2)
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Banded Flint (Polished Stripe Flint)
Silicon Dioxide (SiO2) - variety of Chert
Tiger's Eye (Mineral Collection)
Tiger's Eye (SiO2 with crocidolite inclusions)
Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
Lapis Lazuli (Low Grade)
Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Mica Schist
Mica Schist
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Wishing Stone
Greenschist or Basalt with Quartz/Calcite Vein
Black Obsidian
Volcanic Glass (predominantly SiO2, Silicon Dioxide)
Sandstone with Liesegang Rings
Arenite with Iron Oxide Liesegang Banding
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Green Tourmaline (Verdelite)
Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
Banded Gneiss
Gneiss (High-grade metamorphic rock)
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
Man-made Synthetic Material (Not a rock or mineral)
Polyester (Polyethylene terephthalate) / Faux Fur
Dragon Blood Jasper
Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))
Pyrite
Iron Pyrite (FeS₂)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sunstone and Green Aventurine
Sunstone: (Ca,Na)[(Al,Si)2Si2O8] (Plagioclase Feldspar Group); Green Aventurine: SiO2 (Quartz)
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)