Pyrite and Quartz Agglomerate
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Category
Igneous, Metamorphic, And Sedimentary
Browse igneous, metamorphic, and sedimentary specimens identified by the Rock Identifier community.
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Pyrite
Iron Sulfide (FeS2)
mineral
Mica Schist with Quartz
Mica Schist (principally Muscovite and Biotite with Quartz veins)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Vesicular Basalt with Epidote/Amygdaloidal Basalt
Amygdaloidal Basalt (Mg, Fe)2SiO4 + Ca2(Al, Fe)3(SiO4)3(OH)
igneous
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Anthracite Coal
Anthracite (Carbon-based sedimentary-metamorphic rock)
metamorphic
Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2) with trace Iron
mineral
Quartz with Oxides
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Quartz (Smoky/Grey Quartz Variant)
Silicon Dioxide (SiO2)
mineral
Ruby (Pink to Red Corundum)
Al2O3 (Corundum with Chromium impurities)
mineral
Milky Quartz Pebble with Iron staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Tumbled)
Smoky Quartz (SiO2 - Silicon Dioxide)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Pink Feldspar
Orthoclase (KAlSi3O8) or Microcline
mineral
Red Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral