Banded Gneiss
Gneiss (variable mineral composition)
Category
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (variable mineral composition)
Gneiss
Gneiss (pronounced 'nice')
Diamond
Diamond (Pure Carbon, C)
Diamond (in jewelry)
Cubic Carbon (C)
Banded Gneiss
Gneiss (pronounced "nice")
Concretion
Septarian Concretion
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Agate (translucent pebble)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Coarse Sand or Fine Gravel
Clastic Sediment (unconsolidated)
Black Jasper (Etched)
Silicon Dioxide (SiO2) with impurities
Obsidian
Obsidian (Volcanic Glass, SiO2 + oxide impurities)
Pyrite
Iron Sulfide (FeS2)
Quartz (worked as a tool or artifact)
Silicon Dioxide (SiO2)
Optical Calcite
Calcium Carbonate (CaCO3)
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
Gold Nugget
Native Gold (Au)
Ferruginous Sandstone (with Pyrite/Gold associations)
Ferruginous Arenite (SiO2 + Fe2O3)
Banded Gneiss
Gneiss
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])
Diamond
Carbon (C)
Gold Nuggest
Native Gold (Au)
Travertine (used in construction, not a 'specimen' in situ)
Travertine
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Fuchsite Quartzite
Fuchsite-bearing Quartzite
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
Citrine
Silicon Dioxide (SiO2)
River Pebble (likely Quartzite or Quartz)
Quartzite (SiO2)
Schist
Mica Schist
Gold Nugget / Gold-bearing Quartz
Native Gold (Au)
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony variant
Pallasite Meteorite (likely Imilac or Brenham)
Stony-Iron Meteorite (Pallasite)
Quartzite with inclusions
Quartzite
Calcite
Calcium Carbonate (CaCO3)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Iron Ore (Limonite and Hematite)
Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Strawberry Quartz (Red Aventurine)
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Iron Meteorite (likely an Individual specimen)
Iron Meteorite (Group IAB, IIAB, IIIAB, etc., Fe-Ni alloy)
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Blue Calcite
Calcium Carbonate (CaCO3)