Quartzite with Iron Inclusions
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)
Category
Browse metamorphic and sedimentary specimens identified by the Rock Identifier community.
Quartzite with Iron Inclusions
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)
Pink Quartzite
Quartzite (primarily SiO2)
Garnet
Garnet group (X3Y2(SiO4)3)
Rough Emerald
Emerald (Beryl), Be3Al2(SiO3)6
Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Mica (Lepidolite or Muscovite)
Phyllosilicate mineral (KAl2(AlSi3O10)(OH)2 for Muscovite)
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Biotite in Host Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Peacock Ore
Bornite (Cu5FeS4)
Mica
Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Epidote in Quartz (Epidosite)
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Yellow Aventurine
Quartz (Silicon Dioxide - SiO2) with inclusions of Mica
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Yellow Aventurine (Yellow Quartzite)
Silicon Dioxide (SiO2) with inclusions
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)
Rhodonite
Rhodonite (Mn2+SiO3)
Jade
There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.
Rhodonite
Rhodonite (MnSiO3)
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
Muscovite Mica
Muscovite [KAl2(AlSi3O10)(OH)2]
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
Unakite
Epidotized Granite
Magnetite or Hematite-rich Ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Slate
Slate (foliated metamorphic rock rich in quartz, sericite, and chlorite)
Greenschist
Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)
Charnockite
Orthopyroxene-bearing granite (Charnockite)
Quartzite River Rock
Quartzite (primarily SiO2)
Schist
Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Greenshist / Chlorite Schist
Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)