Blue Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Blue Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Milky Quartz
Silicon Dioxide (SiO₂)
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
Quartzite
Quartzite (mostly SiO2)
Milky Quartz
Quartz (SiO2)
Quartz (Milky or Smoky)
Silicon Dioxide (SiO2)
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Quartzite
Quartzite (primarily SiO2)
Amethyst Geode
Amethyst (SiO2 with iron impurities)
Pink Granite
Granite (Phaneritic Quartz-Feldspar intrusive rock)
Quartzite
Metamorphosed Quartz Sandstone
Quartzite
Quartzite (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Quartz
Silicon Dioxide (SiO2)
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Quartz (Variety of Rough Mineral Specimens)
Silicon Dioxide (SiO2)
Serpentine (Nephrite-like Serpentine)
Serpentinite (Hydrous magnesium iron phyllosilicate)
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
Rough Blue Sapphire
Corundum (Al2O3)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartzite River Rock
Quartzite (SiO2)
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
Gneiss
Gneiss (High-grade metamorphic rock)
Quartzite
Quartzite (primarily SiO2)
Chert (Quartz Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Quartzite
Quartzite
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Quartzite Pebble
Metamorphic Quartzite (primarily SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Agate
Silicon dioxide (SiO2) - variety Chalcedony
Quartzite Pebble
Metamorphosed Quartz (SiO2)