Granite (likely a river or beach pebble)
Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)
Igneous
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite with inclusions
Quartzite (primarily SiO2)
metamorphic
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Mica-rich Sandstone or Micaceous Schist Weathering
Micaceous Schist (Muscovite-Quartz composition)
Metamorphic or Sedimentary depending on local grade
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Corundum (Sapphire in Host Rock)
Corundum (Aluminum Oxide, Al2O3)
mineral
Granite
Phaneritic high-silica plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Mica)
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
metamorphic
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Moonstone (Tumbled)
Orthoclase (Potassium Feldspar) - (K,Na)AlSi3O8
mineral
Peach Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with inclusions
mineral
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Unakite
Epidotized Granite
metamorphic
Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic
Eclogite
Eclogite (Omphacite-Garnet Metamorphic Rock)
metamorphic
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Smoky Quartz (Tumbled)
Smoky Quartz (SiO2 - Silicon Dioxide)
mineral
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Plutonic Igneous Rock (composed of K-feldspar, Quartz, and Mica)
igneous
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite Schist)
metamorphic
Schist
Mica Schist
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Red aventurine
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral