Moonstone
Orthoclase Feldspar (KAlSi3O8)
Category
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Rhodonite in Matrix
Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))
Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
Pyrite
Pyrite (Iron sulfide, FeS₂)
Quartz
Quartz (SiO₂)
Bi-Color Tourmaline (or Watermelon Tourmaline)
Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)
Smoky Quartz
Quartz (SiO₂)
Quartz
Silicon Dioxide (SiO₂)
Rhodonite
Manganese Inosilicate (MnSiO3)
Milky Quartz
Quartz (SiO2)
Quartz (likely a clear or rock crystal variety)
Quartz (SiO2 - Silicon Dioxide)
Smoky Quartz
Smoky Quartz (SiO2)
Rose Quartz
Rose Quartz (SiO2)
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Seraphinite (Clinochlore)
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
Calcite
Calcite (CaCO3)
Beryl (Variety Mix)
Be3Al2(Si6O18)
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Zircon
Zircon (ZrSiO4)
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
Kyanite
Kyanite (Al2SiO5)
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Banded Gneiss
Gneiss (pronounced 'nice')
Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Green Aventurine
Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions