Serpentinite
Serpentinite ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
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Milky quartz (likely weathered quartzite or quartz vein fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Lapis Lazuli
Lapis Lazuli (Complex rock containing Sodalite, Lazurite, Calcite, and Pyrite)
metamorphic
Lapis Lazuli
Lazurite cluster (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Epidosite (Epidote-Quartz rock)
Epidote-rich hydrothermal rock
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex rock containing Sodalite, Lazurite, Calcite, and Pyrite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex aggregate of Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Pyrite, and Calcite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex silicate mixture containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Complex aggregate containing Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
White Chalcedony
Silicon Dioxide (SiO2)
mineral
Tumbled Carnelian
Silicon Dioxide (Variety of Chalcedony), SiO2
gemstone
Carnelian
Silicon dioxide (chalcedony variety), SiO2
gemstone
Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Celestite
Strontium Sulfate (SrSO4)
mineral
Yellow Chalcedony (Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Blue Chalcedony
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chalcedony (Grey/White Agate)
Silicon Dioxide (SiO₂)
mineral
Yellow Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Pink Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Blue Chalcedony
Chalcedony (SiO2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Sulfur on matrix
Native Sulfur (S8)
mineral
Tufa
Calcium carbonate (CaCO3) - Porous Limestone
sedimentary
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral