Quartz
Silicon dioxide (SiO₂)
Category
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
Quartz
Silicon dioxide (SiO₂)
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Tiger's Eye and Carnelian Quartz
Silicon Dioxide (SiO2)
Pyrite
Pyrite (Iron sulfide, FeS₂)
Garnet-bearing metamorphic rock, likely mica schist
Biotite–garnet schist; commonly includes quartz, feldspar, biotite, and almandine garnet
Tumbled rhodonite
Rhodonite, manganese inosilicate (MnSiO₃), commonly mixed with quartz and manganese oxides
Ruby in Zoisite
Anyolite
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
Garnet (likely Almandine or Pyrope)
Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
Lapis Lazuli
Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Actinolite-Tremolite series)
Lapis Lazuli
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
Moonstone
Orthoclase (KAlSi3O8)
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Magnetite
Magnetite (Fe3O4)
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
Quartzite
Metamorphic Quartzite (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Tumbled green aventurine
Quartz (SiO₂), commonly containing fuchsite mica inclusions
Sunstone and Garnet
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
Greenschist
Greenschist (Chlorite-actinolite schist)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Epidote
Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
Fuchsite
Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Garnet (Almandine-Pyrope)
Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3
Jade
There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Quartz
Silicon Dioxide (SiO₂)
Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix