Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Category
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Garnet Schist
Almandine-Garnet Mica Schist
Green Aventurine
Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions
Yellow Quartzite (River Pebble)
Crystalline Quartz (SiO2)
Blue Quartzite (Blue Aventurine / Dumortierite Quartz)
Quartzite with inclusions (SiO2 with AlAl4BSi3O18)
Quartzite River Pebble
Quartzite (primarily Silicon Dioxide, SiO2)
Schist
Mica Schist (contains muscovite/biotite and quartz)
Pyrite in Matrix (likely Quartz or Coal)
Iron Sulfide (FeS2)
Yellow Jade (Nephrite or Quartzite variety)
Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite) / SiO2 (Quartzite variant)
Native Gold Nugget
Native Gold (Au)
Jadeite (Jade)
Jadeite, NaAlSi₂O₆
Unakite
Unakite (Epidotized Granite)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Aquamarine with Ruby Accent
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Mica Schist
Mica Schist
Lapis Lazuli (polished cabochon)
Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)
Red Tiger Eye (or Polished Jasper Gneiss)
Silicon dioxide with crocidolite inclusions (SiO2)
Aventurine
Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
White Moonstone (Scolicite or White Feldspar var. )
Lattice-structure Silicate (KAlSi3O8)
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Amazonite
Microcline (KAlSi3O8) with lead impurities
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Orange Calcite
Calcium Carbonate (CaCO3)
Unakite
Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
Yellow Jade
Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)
Lazulite
Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)
Unakite
Epidotized Granite
Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
Pyrite
Iron Disulfide (FeS2)
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
Rhodonite
Rhodonite (MnSiO3)
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
Lapis Lazuli
Lapis Lazuli (Complex silicate mixture containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Marble
Recrystallized Calcite (CaCO3)
Lapis Lazuli (polished cabochon/sphere)
Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)
Lapis Lazuli
Lapis lazuli (a rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2