Aquamarine (Beryl)
Beryllium Aluminum Silicate - Be3Al2Si6O18
gemstone
Category
Metamorphic
Browse metamorphic specimens identified by the Rock Identifier community.
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Sapphire
Corundum (Al2O3)
mineral
Sphalerite
Zinc Sulfide (ZnS)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Mica Schist
Mica Schist (Quartz-Mica Schist)
metamorphic
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
metamorphic
Banded marble (probable calcite marble)
Calcite marble, CaCO₃; possibly impure dolomitic marble
metamorphic
Tumbled banded gneiss or amphibolite
Banded metamorphic rock, likely quartz–feldspar–biotite gneiss with amphibole
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Granite-like granitic rock
Crystalline plutonic rock, primarily quartz, feldspar, and mica/amphibole
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Green Slate Pebble (Serpentine / Greenschist Pebble)
Greenschist / Low-grade Metamorphic Rock
metamorphic
Quartzite with Mafic Intrusion (Gneiss/Schist Contact)
Metamorphic Quartzite (SiO2) with Amphibole/Biotite Schist
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Green aventurine quartz (probable)
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Feldspar
Feldspar (Orthoclase/Microcline)
mineral
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
mineral
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Jadeite Jade
NaAl(Si2O6)
gemstone
Pink Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Beryl
Beryl (Be3Al2(SiO3)6)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Basalt Pebble
Extrusive Igneous Rock
igneous
Gneiss
Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica
metamorphic
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Rhodonite
Rhodonite (MnSiO3)
mineral
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Tumbled jadeite or nephrite jade bead bracelet
Jade: jadeite (NaAlSi₂O₆) or nephrite, a tremolite–actinolite amphibole aggregate
gemstone
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Serpentinite (likely serpentinized ultramafic rock)
Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite
metamorphic