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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Pyrite
Iron Sulfide (FeS2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic silicate rock
metamorphic
Epidotite (Unakite-related)
Epidote-rich rock
metamorphic
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Garnet
Almandine/Pyrope Garnet (Silicate Mineral Group)
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Garnet (likely Almandine or Pyrope)
Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3
mineral
Milky quartz
Quartz (SiO₂)
mineral
Likely rough garnet crystal
Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Moonstone (Feldspar)
Orthoclase or Oligoclase (KAlSi3O8)
mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Clear quartz crystal cluster
Quartz, silicon dioxide (SiO₂)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Red corundum (ruby-colored polished crystal)
Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium
gemstone
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Tourmaline (likely Schorl)
Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4
Mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Foliated metamorphic rock
metamorphic
Garnet fragments
Garnet-group silicate, most likely almandine–pyrope or spessartine; composition varies, commonly (Fe,Mg,Mn)₃Al₂Si₃O₁₂
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral