Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
Category
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
Likely amphibolite
Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar
Tumbled green aventurine (probable)
Quartz variety: aventurine quartz, SiO₂, colored commonly by fuchsite mica
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Brown Garnet
Andradite or Almandine Garnet (general formula X3Y2(SiO4)3)
Rhodonite
Inosilicate (Manganese Iron Magnesium Calcium Silicate, (Mn,Fe,Mg,Ca)SiO3)
Garnet Amphibolite (or Garnet Gneiss)
Garnet amphibolite / Garnet-bearing metamorphic rock
Schist
Metamorphic Rock (Mica Schist)
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
Pyrite
Iron Disulfide (FeS2)
Weathered gneiss (probable)
Banded quartz–feldspar–mica gneiss
Talc
Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)
Clear Quartz
SiO2 (Silicon Dioxide)
Garnet in Schist or Pegmatite
Almandine Garnet (Fe3Al2(SiO4)3) in host rock
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
Arsenopyrite with Schist Matrix
Arsenopyrite (FeAsS)
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
Magnetite
Magnetite (Fe3O4)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
Magnetite
Magnetite (Fe3O4)
Banded gneiss
Gneiss, commonly quartz–feldspar–mica gneiss
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
Pyrite in Matrix
Iron Disulfide (FeS2)
Clear Quartz
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Weathered granite or granitic gneiss
Granite; chiefly quartz, feldspar, and mica, possibly with gneissic foliation
Schist
Schist