Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Quartzite
Quartzite (primarily SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby
Corundum (Al2O3) with Chromium traces
mineral
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Pumice
Vesicular volcanic glass
igneous
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Quartz (Field Stone)
Silicon Dioxide (SiO2)
mineral
Quartz with Mica
SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)
Mineral
Iron-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Sapphire (Corundum)
Corundum (Al2O3)
mineral
Prehnite
Calcium aluminum silicate hydroxide, Ca2Al(AlSi3O10)(OH)2
mineral
Raw Fluorite
Calcium Fluoride (CaF2)
mineral
Hypersthene
Hypersthene (Enstatite variety), (Mg,Fe)SiO3
Mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Pumice
Pumice (Felsic vesicular volcanic glass)
igneous
Quartz crystals on matrix
Silicon dioxide (SiO2)
mineral
Pegmatite containing Muscovite and Quartz
Granitic Pegmatite (SiO2 with KAl2(AlSi3O10)(OH)2)
igneous
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
mineral
Peridotite
Peridotite (varieties include Dunite, Lherzolite, Harzburgite)
igneous
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
mineral
Yellow Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt
Basalt
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
gemstone
Black Tourmaline (Schorl)
Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Gneiss (Metamorphosed Pebble)
Gneiss with Quartz/Feldspar banding
metamorphic
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Sodalite
Sodium aluminum silicate chloride (Na8(Al6Si6O24)Cl2)
mineral
Limestone (Weathered)
Sedimentary Carbonate Rock (CaCO3)
sedimentary
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
metamorphic
Blue Banded Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Aquamarine
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral