Pink-red faceted gemstone, possibly synthetic corundum or spinel
Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)
gemstone
Category
Metamorphic And Mineral
Browse metamorphic and mineral specimens identified by the Rock Identifier community.
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Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Ruby in Zoisite
Anyolite
metamorphic
Foliated metamorphic rock, likely gneiss
Biotite–quartz–feldspar gneiss, possibly migmatitic gneiss
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Rhodonite
Rhodonite (MnSiO3)
mineral
Brown Marble
Metamorphic Limestone (CaCO3)
metamorphic
Sapphirine in Magnesian Schist
Sapphirine: (Mg,Al)8(Al,Si)6O20
metamorphic
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Slate
Slate; fine-grained metamorphosed shale, commonly quartz–muscovite/chlorite rich
metamorphic
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Schist
Schist
Metamorphic
Serafina (Serafinite / Clinochlore)
Clinochlore (Mg5Al)(AlSi3O10)(OH)8
mineral
Schist
Mica Schist (Foliated Metamorphic Rock)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Small metallic-looking rock fragment
Uncertain; possibly galena-bearing ore or mica-rich schist
mineral
Black Sand (Magnetite Sand)
Magnetite (Fe3O4)
mineral
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Greenstone
Metabasalt / Greenschist
metamorphic
Green Tourmaline (Verdelite) / Actinolite
Tourmaline group: Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH)4 / Actinolite: Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist
Chlorite-actinolite schist
metamorphic
Gneiss (Metamorphic Pebble)
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Quartz with Mica
Silicon Dioxide (Quartz, SiO2) with Muscovite/Biotite Mica
mineral
Sphalerite
Zinc Sulfide (ZnS)
mineral
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
metamorphic
Rounded gray metamorphic pebble, likely quartzite or gneiss
Quartzite (quartz-rich rock) or fine-grained gneiss; exact identification requires testing
metamorphic
Greenschist
Chlorite schist
metamorphic
Pink Quartz
Silicon Dioxide (Quartz), SiO2
mineral
Mica
Mica group (often Muscovite or Biotite)
mineral
Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
mineral
Green Tourmaline
Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral