Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
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Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Quartzite Pebble (River Siltstone/Quartzite)
Quartzite (SiO2 composition)
metamorphic
Greenstone / Metagraywacke
Metamorphosed basaltic or sedimentary rock (Complex Silicate)
metamorphic
Quartzite with Iron Inclusions
Quartzite (SiO2 with Fe2O3 impurities)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz vein in weathered host rock
Milky quartz (SiO₂), likely in a granitic or metamorphic matrix
mineral
Quartzite with Iron Hydroxide Staining
Quartzite (primarily SiO2) with Limonite/Goethite staining
metamorphic
Milky quartz-bearing rock, possibly quartzite
Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Plagioclase Feldspar
Plagioclase (NaAlSi3O8 - CaAl2Si2O8 series)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi₃O₈)
mineral
Serpentine
Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Slate
Slate (Foliated Metamorphic Rock)
metamorphic
Unakite / Feldspar Veined Metamorphic Pebble
Metamorphic Rock with K-Feldspar, Epidote, and Quartz
metamorphic
Mixed collection of natural stones
Several unidentified lithologies, likely including basalt, granite, quartzite, sandstone, and weathered metamorphic rocks
igneous, metamorphic, sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Serpentinite
Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)
metamorphic
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Gray slate
Slate; fine-grained foliated metamorphic rock composed mainly of mica and quartz
metamorphic
River Cobble (likely Metasedimentary)
Metasedimentary Rock / Quartz-rich Sandstone
metamorphic
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Unakite (Tumbled)
Unakite (altered granite)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Mineral
River Rock (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Druzy Quartz (Prasiolite)
Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)
metamorphic
Greenschist
Chlorite Schist
metamorphic
Phyllite
Phyllite (Foliated metamorphic rock)
metamorphic