Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Tumbled serpentine (likely)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄
metamorphic
Labradorite
Labradorite, (Ca, Na)(Al, Si)4O8
mineral
Agate / Chalcedony Geode Nodule
Silicon Dioxide (SiO2)
sedimentary
Smoky Quartz with Hematite inclusions
Silicon Dioxide (SiO2) with Fe2O3 inclusions
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Mica Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Unakite Granitoid
Unakite (Metasomatized Granite)
metamorphic
Schist (Greenschist / Mica Schist)
Foliated Metamorphic Rock (rich in chlorite, muscovite, and quartz)
metamorphic
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
River Quartz Pitting/Cobble
Silicon Dioxide (SiO2)
mineral
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Mica Schist with Iron Staining
Mica Schist
metamorphic
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Mineral
Goldstone (blue-goldstone–style glass) beads
Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral
mineral
Schist
Mica Schist
metamorphic
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Granitoid (Granite/Gneiss mix)
Granite or Granitic Gneiss (Silicon dioxide SiO2 with Al, K, Na silicates)
igneous/metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Mica Schist
Muscovite/Biotite Schist
metamorphic
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Orbicular jasper / brecciated jasper slab
Silicified volcanic rock composed mainly of microcrystalline quartz (SiO₂), with iron-oxide and possible chalcedony/agate bands
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Quartz pebble
Silicon dioxide (SiO2)
mineral
Green Tourmaline
Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH))
mineral
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz variety (SiO2 with inclusions)
mineral
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Mineral
Agate
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rough Emerald/Green Beryl
Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium
mineral