Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Category
Metamorphic Rock
Browse metamorphic rock specimens identified by the Rock Identifier community.
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Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Alexandrite
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁₈)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
mineral
Red Siltstone (or Red Shale)
Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)
sedimentary
Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Garnet
Garnet group (X3Y2(SiO4)3)
mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Vesicular Basalt
Basalt (with vesicular texture)
igneous
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Mineral (gemstone)
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Green Schist
Greenschist
metamorphic
Schist
Mica Schist
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Green Quartz / Aventurine
Silicon Dioxide (SiO2) with inclusions
Metamorphic
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Sandstone with Quartz Veins
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Sandstone with Quartz Vein
Arenite with SiO2 intrusion
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Pumice
Pumice (volcanic rock)
Igneous
Greenschist / Migmatite
Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)
metamorphic
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Aventurine
Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)
mineral
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
mineral