Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Quartz
Quartz (SiO₂)
Red Jasper with Quartz and Hematite
Silicon Dioxide (SiO2) with Ferric Iron inclusions
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Serpentine
Serpentinite (composed primarily of Mg3Si2O5(OH)4)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Quartzite (River Pebble)
Metamorphic Quartz (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartzite with Hematite staining
Metamorphic Rock (rich in SiO2)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Slate with Quartz Vein
Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)
Milky Quartz
Silicon Dioxide (SiO2)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities), SiO2
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartz vein in Schist
Crystalline Silicon Dioxide (SiO2) in Metamorphic Host
Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartzite
Silicon Dioxide (SiO2)
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Dalmatian Jasper (Dalmatian Stone)
Peralkaline Rock with Feldspar and Arfvedsonite
Quartz Crystal Cluster on Matrix
Silicon Dioxide (SiO2)
Quartz (Milky/Clear Variety)
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (mostly SiO2)
White Marble
Recrystallized Calcite (CaCO3)
Tiger's Eye (dark/grey variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartzite
Quartzite (SiO2)