Petrified Wood
Silicified Wood (SiO2)
fossil
Category
Mineral (Metamorphic Pseudomorph)
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
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Tumbled tiger’s-eye
Quartz variety, mainly fibrous quartz pseudomorph after crocidolite; SiO₂
mineral
Polished tiger’s-eye
Quartz variety, primarily fibrous chalcedony pseudomorph after crocidolite; SiO₂
mineral
Tumbled tiger’s-eye
Tiger’s-eye quartz, microcrystalline SiO₂ with fibrous crocidolite pseudomorphs
mineral
Limonite (also known as Yellow Ochre or Brown Hematite)
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
Mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Tumbled tiger’s-eye
Tiger’s-eye quartz, fibrous chalcedony/quartz (SiO₂) with crocidolite pseudomorphs
mineral
Epidote
Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Greenschist
Chlorite Schist
metamorphic
Gneiss with Quartz Vein
Metamorphic Gneiss
metamorphic
Garnet in Schist (Mica Schist with Garnet Inclusion)
Garnetiferous Mica Schist (X3Al2(SiO4)3)
metamorphic
Polished tiger’s-eye jasper (likely brecciated jasper)
Quartz-rich microcrystalline silica, chiefly SiO₂, with iron oxides and possible fibrous pseudomorphs
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Magnetite Ore
Magnetite (Fe3O4)
mineral
Greenschist (or Serpentinite) with Quartz-Feldspar Vein
Metabasalt / Greenschist Facies Rock
metamorphic
Magnetite
Magnetite (Fe3O4)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Epidote
Epidote - Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Rounded, banded metamorphic cobble
Likely gneiss or foliated quartz-rich metamorphic rock; exact identification is uncertain from the photograph.
metamorphic
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Quartz
Silicon dioxide (SiO2)
mineral
Banded gneiss
Gneiss, commonly quartz–feldspar–mica gneiss
metamorphic
Garnet-bearing metamorphic rock, likely garnet schist or amphibolite
Almandine garnet (Fe₃Al₂Si₃O₁₂) in mica- or amphibole-rich matrix
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))
mineral
Quartz with Mica / Chlorite Inclusion
Silicon Dioxide (SiO2) with Phyllosilicate minerals
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Likely blue-green kyanite
Kyanite, Al₂SiO₅
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Rhodonite
Manganese silicate (MnSiO3)
mineral
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Feldspar in Matrix
Feldspar group minerals in metamorphic or igneous matrix
igneous