Granite
Granite (Felsic Plutonic Rock)
igneous
Category
Metamorphic Rock
Browse metamorphic rock specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Basalt
Basalt (Mafic Extrusive)
igneous
Greenstone (metamorphosed basalt)
Greenschist / Meta-basalt
metamorphic
Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Rough Sapphire
Corundum (Al2O3)
mineral
Agate (Banded Chalcedony)
Agate (Silicon Dioxide, SiO2)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions
mineral
Sapphire
Corundum (Al2O3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Ruby (Corundum)
Aluminum Oxide (Al2O3) with Chromium traces
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3 with trace amounts of iron and titanium)
mineral
Corundum (Ruby Variety)
Corundum (Al2O3)
mineral
Hypersthene
Hypersthene (Enstatite variety), (Mg,Fe)SiO3
Mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Labradorite
Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)
mineral
White Zircon
Zircon (Zirconium silicate, ZrSiO4)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Dumortierite Quartz (Blue Quartz)
Al7(BO3)(SiO4)3O3 / Quarz with Dumortierite inclusions
mineral
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Garnet (likely Almandine or Pyrope)
Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Rough Ruby
Corundum (Al2O3) with Chromium traces
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
mineral
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous