Banded Gneiss
Gneiss (Metamorphic Rock)
Category
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (Metamorphic Rock)
Vesicular Basalt with Epidote/Amygdaloidal Basalt
Amygdaloidal Basalt (Mg, Fe)2SiO4 + Ca2(Al, Fe)3(SiO4)3(OH)
Orbicular Rhyolite (Rainforest Jasper)
Rhyolite containing Spherulites (SiO2 with impurities)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Moonstone (Tumbled)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
Smoky Quartz
Silicon Dioxide (SiO₂)
Smoky Quartz
Silicon Dioxide (SiO2)
Citrine
Silicon dioxide (SiO2)
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Moonstone
Orthoclase and Albite (KAlSi3O8 / NaAlSi3O8)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Quartz (Silicon Dioxide) - SiO2
Citrine
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Moonstone (Adularia)
Potassium aluminum silicate (KAlSi3O8)
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
Biotite (Black Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
Sand Grain (Quartz)
Silicon Dioxide (SiO2)
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
Quartz Sand/Gravel
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2)
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
Chalcedony (Carnelian)
Silicon Dioxide (SiO2)
Pyrite
Iron Disulfide (FeS2)
Chalcedony
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Blue Chalcedony
Chalcedony (SiO2)
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Gneiss (with Quartz and Mica)
Gneiss
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
Green Schist
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Cloudy Variety)
Silicon Dioxide (SiO2)
Chalcedony (Agate/Chert)
Silicon Dioxide (SiO₂)
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss