Quartz pebble
Silicon dioxide (SiO2)
mineral
Category
Metamorphic And Igneous Rocks
Browse metamorphic and igneous rocks specimens identified by the Rock Identifier community.
Learn about Metamorphic And Igneous Rocks in the encyclopedia
View all →
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Green Aventurine
SiO2
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Onyx (Agate) or Black Spinel/Glass
SiO2 (Silicon dioxide) if onyx/agate
gemstone
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Prehnite
Calcium aluminum silicate hydroxide, Ca2Al(AlSi3O10)(OH)2
mineral
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
Potassium Feldspar
K-Feldspar (Orthoclase/Microcline), KAlSi3O8
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Corundum
Corundum (Aluminium oxide, Al2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8 (Plagioclase Feldspar)
mineral
Pyrite or Chalcopyrite specimen (Gold-colored mineral coating)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
mineral
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
mineral
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Fossilized marine shell fragment
Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)
fossil
Green Gneiss
Metamorphic Gneiss
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Ruby in Matrix
Corundum (Al2O3)
mineral
Muscovite
Muscovite, KAl2(AlSi3O10)(OH)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone