Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Category
Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Learn about Mixed (Igneous, Sedimentary, Metamorphic, And Minerals) in the encyclopedia
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Copper Ore (Malachite and Limonite bearing)
Cuprite, Malachite, and Limonite mixture
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Caribbean Calcite
Calcite (CaCO3) with Aragonite (CaCO3)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Quartz in Greenstone
Metamorphic rock with quartz vein (SiO2 / mixed silicates)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate
sedimentary
Red Jasper with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Smoky Quartz and Orthoclase Feldspar
Granitic Pegmatite (SiO2 + KAlSi3O8)
igneous
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Weathered schist or gneiss fragment
Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Mixed Gravel and Pebbles
Polylithic Alluvial Aggregate
igneous, sedimentary, and metamorphic mix
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments (clastic sediment)
sedimentary
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Dark gray rounded river pebble
Likely basalt or fine-grained volcanic rock; exact identification requires testing
igneous
Greenschist
Chlorite schist
metamorphic