Marble
Metamorphic Limestone (CaCO3)
metamorphic
Category
Metamorphic Or Mineral
Browse metamorphic or mineral specimens identified by the Rock Identifier community.
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Schist
Schist
metamorphic
Limonite or Goethite (Ironstone)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Biotite-rich schist (probable mica schist)
Mica schist; predominantly quartz, biotite, and feldspar
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Bismuthinite with Chalcopyrite and Quartz
Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)
mineral
Gneiss (likely biotite–quartz–feldspar gneiss)
Foliated gneiss; primarily quartz (SiO₂), feldspar, and biotite mica
metamorphic
Green aventurine quartz (probable)
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz with Epidote
Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
mineral
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Epidote
Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Biotite-rich gneiss
Gneiss, likely quartz–feldspar–biotite gneiss
metamorphic
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Mineral
Iolite (Cordierite)
Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18
Mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Rhodonite-bearing rock
Rhodonite (MnSiO₃), likely with manganese oxides and quartz
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Rhodonite
Manganese Inosilicate (MnSiO3)
Mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Quartzite with Quartz Veins
Metamorphic Quartzite (SiO2)
metamorphic
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Milky quartz fragment
Quartz, silicon dioxide (SiO₂)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
River Stone (possibly Gneiss)
Metamorphic Gneiss
metamorphic
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Raw Emerald (Emerald Beryl)
Beryl (Be3Al2Si6O18) with chromium/vanadium impurities
mineral
Tumbled jade-like stone, likely jadeite or nephrite
Jadeite (NaAlSi₂O₆) or nephrite, a fibrous amphibole aggregate
mineral
Peacock Ore
Bornite (Cu5FeS4) with surface tarnish
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides
mineral
Quartzite Pebble (with mineral veining)
Metamorphic Quartzite (SiO2)
metamorphic