Amethyst
Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities
Category
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
Amethyst
Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Quartzite
Quartzite
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
Quartzite with Iron Inclusions
Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite
Quartzite Pebble
Meta-quartzite
River Quartzite (River Rock)
Quartzite (SiO2)
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Staurolite (Fairy Cross)
Staurolite (Fe2+2Al9Si4O23(OH))
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Rhodonite
Manganese Inosilicate (MnSiO3)
Yellow Quartzite
Quartzite (SiO2)
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
Yellow Quartzite River Stone
Quartzite (primarily SiO2)
Quartzite Pebble
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Serpentine
Antigorite / Lizardite / Chrysotile (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Quartzite Pebble (Beach Stone)
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Yellow Quartzite
Quartzite (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Quartz
Quartz (SiO₂)
Quartz (in matrix)
Quartz (SiO₂)
Red Quartzite / Metasandstone River Pebble
Quartzite (primarily SiO2 with hematite inclusions)
Quartzite River Rock
Quartzite (Silicon Dioxide, SiO2)
River Cobble (Quartzite with Iron Staining)
Metamorphic Quartzite (SiO2 with Fe2O3 inclusions)
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)