Kyanite
Al2SiO5
mineral
Category
Mineral Composite
Browse mineral composite specimens identified by the Rock Identifier community.
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Limonite
FeO(OH)•nH2O
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Galena
Lead Sulfide (PbS)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite
FeO(OH)•nH2O
mineral
Malachite on Quartz
Cu2CO3(OH)2 / SiO2
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Kyanite
Al2SiO5
mineral
Amethyst
Silicon Dioxide (SiO2)
mineral
Limonite
FeO(OH)•nH2O
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Limonite
FeO(OH)•nH2O
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Graphite
Graphite (Carbon, C)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)
mineral
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Malachite-bearing Rock
Cu2CO3(OH)2
mineral
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
mineral
Graphite
Carbon (C)
mineral
Galena
Lead Sulfide (PbS)
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Chrysotile Asbestos
Chrysotile (Mg3Si2O5(OH)4)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Calcite
Calcite (CaCO3)
Mineral
Rounded gray pebble, likely andesite
Probably andesite; identification from the photo is uncertain
igneous
Petrified wood
Silicified fossil wood; commonly quartz (SiO₂) replacing woody tissue
fossil
Likely feldspar (rough specimen)
Probably potassium feldspar, KAlSi₃O₈; exact identification is uncertain from the image
mineral
Kyanite
Aluminum Silicate, Al2SiO5
mineral
Not a geological specimen
N/A (man-made object)
N/A
Pegmatite
Granitic pegmatite, composed mainly of quartz and feldspar with possible mica
igneous
Amygdaloidal Basalt with Quartz Veining
Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining
igneous