Magnetite (Lodestone variety)
Magnetite (Fe3O4)
Category
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
Tourmaline
Complex Borosilicate - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite species)
Smoky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Mica
Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2
Amethyst (Tumbled)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
Morganite (Pink Beryl)
Beryllium aluminum silicate Be3Al2(SiO3)6
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Gray Agate
Cryptocrystalline Quartz (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Tiger's Eye
Titanium-containing Quartz (Silica: SiO2)
Green Aventurine
Quartz variant (SiO2) with Fuchsite inclusions
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Sodalite
Sodalite [Na8(Al6Si6O24)Cl2]
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
Green Aventurine
Quartz variety (SiO2) with fuchsite inclusions
Quartz and Limestone Grouping
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Green Quartzite
Metamorphic Quartzite (often colored by chromium-bearing minerals or fuchsite)
Agate
Silicon Dioxide (Chalcedony), SiO2
Agate
Silicon Dioxide (Chalcedony), SiO2
Raw Quartz
Silicon Dioxide (SiO2)
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
Tumbled Amethyst
Quartz (Silicon Dioxide, SiO2, colored by iron impurities)
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
Sunstone
Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8
Smoky Quartz
Quartz (Silicon Dioxide, SiO2)
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
Greenstone (Epidosite/Altered Diorite)
Metabasalt or Meta-andesite / Epidotized Diorite
Muscovite Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 matrix)
Mica Schist
Mica Schist (primarily Muscovite or Biotite Schist)
Slate
Slate (Foliated metamorphic rock consisting mainly of quartz and muscovite or illite)
Banded Marble
Recrystallized Calcite (CaCO3)
Blue Quartzite (Blue Aventurine / Dumortierite Quartz)
Quartzite with inclusions (SiO2 with AlAl4BSi3O18)
Schist
Mica Schist
Gneiss (Granitic Gneiss)
Gneiss