Gneiss
Gneiss
Category
Browse mineral (metal) specimens identified by the Rock Identifier community.
Gneiss
Gneiss
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock (Basalt)
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
Gneiss
Foliated Metamorphic Rock (Gneiss)
Hemimorphite on Limonite Gossan
Hemimorphite (Zn4Si2O7(OH)2·H2O) on Limonite matrix
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
Gneiss (with Quartzite and Mica)
Gneiss
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Diorite
Phaneritic plutonic rock (dominated by plagioclase feldspar and hornblende)
Basalt with Epidote (Greenstone)
Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)
Fluorite
Calcium Fluoride (CaF2)
Limonite (Iron Ore)
Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO₂)
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Rhodochrosite
Manganese Carbonate (MnCO3)
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Chrysocolla and Azurite in Matrix
Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)
Limonite (Iron Ore)
Goethite and related iron hydroxides (FeO(OH)·nH2O)
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
Hypersthene
(Mg,Fe)SiO3 - Enstatite-Ferrosilite series
Ferruginous Sandstone (Gozzanous)
SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Sandstone (with banding)
Arenite (primarily SiO2)
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Jade (likely Jadeite or Nephrite)
Jadeite (NaAlSi2O6) or Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Note: No specimen visible
Milky Quartz (with Chlorite/Mineral Inclusions)
Silicon Dioxide (SiO2)
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide - SiO2)
Turquoise (with Hematite)
CuAl6(PO4)4(OH)8·4H2O
Limonite (Ironstone)
Hydrous ferric oxides (FeO(OH)·nH2O)