Potassium Feldspar
K-Feldspar (Orthoclase/Microcline), KAlSi3O8
mineral
Category
Metamorphic And Igneous Rocks
Browse metamorphic and igneous rocks specimens identified by the Rock Identifier community.
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Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Corundum
Corundum (Aluminium oxide, Al2O3)
mineral
Ruby (Corundum)
Aluminium oxide with chromium (Al₂O₃:Cr)
gemstone
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
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
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Amazonite
Amazonite (Microcline Feldspar) K(AlSi3O8)
mineral
Milky quartz vein rock
Quartz-rich hydrothermal vein; primarily quartz (SiO₂), with minor iron oxides and possibly feldspar or mica
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tumbled black tourmaline
Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
mineral
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Almandine Garnet
Iron aluminum silicate, Fe3Al2(SiO4)3
gemstone
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Pyrite
Iron Sulfide (FeS2)
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
Quartz
Silicon Dioxide (SiO2)
mineral
Likely garnet crystal
Garnet-group silicate; species cannot be determined from the image
mineral
Quartz vein fragment
Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions
mineral
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂); if quartzite, recrystallized quartz sandstone
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Quartz with Chalcopyrite (or Pyrite)
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
gemstone
Garnet
Silicate mineral group (e.g., Almandine, Fe3Al2(SiO4)3)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral