Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Category
Browse mineral (found in igneous and metamorphic rocks) specimens identified by the Rock Identifier community.
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
Pyrite
Iron Sulfide (FeS2)
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
White Sapphire
Corundum (Al2O3)
Quartz Pebble
Silicon Dioxide (SiO2)
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Sunstone and Green Aventurine
Sunstone: (Ca,Na)[(Al,Si)2Si2O8] (Plagioclase Feldspar Group); Green Aventurine: SiO2 (Quartz)
Muscovite Mica
KAl2(AlSi3O10)(OH)2
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Green Tourmaline
Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
Sunstone
Aventurine Feldspar (Plagioclase Feldspar with inclusions)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
Sodalite
Na8(Al6Si6O24)Cl2
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
Calcite
Calcite (CaCO3)
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
Magnetite
Magnetite (Fe3O4)
Corundum
Corundum (Aluminium oxide, Al2O3)
Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
Pyrite
Iron Disulfide (FeS2)