Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
gemstone
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
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Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Red Garnet Gemstone
Pyrope-Almandine Garnet (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
gemstone
Fuchsite Quartzite (Green Aventurine in raw form)
Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Mica Schist with Quartz
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Raw Garnet (Hessonite / Spessartine)
Silicate mineral group (X3Y2(SiO4)3)
gemstone
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
Serpentine
Serpentine group (e.g., Antigorite, Chrysotile, Lizardite) - (Mg,Fe)3Si2O5(OH)4
metamorphic
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Serpentine
Serpentine group (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe,Al)2O5(OH)4
metamorphic
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Granodiorite (Gneissic Pebble)
Granodiorite displaying minor foliation
igneous/metamorphic
Weathered quartz-rich rock, possibly pegmatite or quartzite
Quartz (SiO₂)-rich aggregate; exact identification is uncertain from the photograph
igneous
Serpentinite
Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)
metamorphic
White Quartz
Quartz (SiO2)
Mineral
Quartzite
Quartzite (principally SiO2)
metamorphic
Marble (White)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Riverstone Quartzite (Water-worn Siltstone/Quartzite)
Metamorphosed Quartz-rich Arenite (SiO2)
metamorphic
Marble
Metamorphosed Limestone/Dolomite
metamorphic
Dragon Blood Jasper
Microcrystalline Quartz (Chalcedony) with Epidote and Piemontite
sedimentary
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Slate with Red Sandstone Landscaping Rock
Foliated Pelitic Metamorphic Rock (Slate) and Ferruginous Sandstone
metamorphic and sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Ruby in Zoisite
Anyolite (Calcium Aluminum Silicate with Aluminum Oxide impurities)
metamorphic
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Metamorphic Rock
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Brecciated Limestone or Marble Pebble
Breccia / Calcite (CaCO3)
Sedimentary / Metamorphic
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Serpentine
Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Quartzite
Metamorphic Quartz Arenite
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Corundum
Corundum (Al2O3)
Mineral
Dendritic Agate (or Dendritic Opal)
SiO2 (for Agate), SiO2·nH2O (for Opal)
Mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal Fragments)
Silicon Dioxide (SiO2)
mineral