Marble
Crystalline Limestone (mostly CaCO3 / Calcium Carbonate)
metamorphic
Category
Metamorphic And Mineral
Browse metamorphic and mineral specimens identified by the Rock Identifier community.
Sapphire (Corundum)
Corundum (Al2O3), variety Sapphire
Mineral
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Jade (Nephrite and Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2; Jadeite: NaAlSi2O6
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) in Quartz (SiO2)
metamorphic
Serpentine
Serpentine-group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Jadeite (variety of Jade)
Jadeite, NaAlSi₂O₆
metamorphic
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)
Metamorphic rock (for both Nephrite and Jadeite)
Quartzite
Quartzite (primarily SiO₂)
metamorphic
Garnet-bearing Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Slate
Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)
metamorphic
Anthracite Coal
Anthracite (Carbon-based metamorphic rock, 86-97% C)
metamorphic
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Quartzite (specifically Pink or Red Quartzite)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Beach Pebble
Quartzite (primarily SiO2)
metamorphic
Unakite
Epidotized Granite
metamorphic
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Agate
Agate (Cryptocrystalline Variety of Quartz, SiO2)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Zebra Jasper (usually a trade name for Serpentine or Basalt blend)
Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4
metamorphic
Jade (specifically Nephrite or Jadeite beads)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Quartzite
Quartzite
Metamorphic rock
Strawberry Quartz
Quartz (SiO₂) with Goethite (α-FeO(OH)) and/or Lepidocrocite (γ-FeO(OH)) inclusions
Mineral
Quartzite
Quartzite
Metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Pink Quartzite
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Quartzite
Quartzite (SiO2)
Metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Slate
Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)
metamorphic