Quartz
Silicon Dioxide (SiO2)
Category
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
White Agate (resembling Bone Chalcedony)
Cryptocrystalline Quartz (SiO2)
Quartzite
Quartzite (SiO2)
Titanium Quartz (Rough)
Titanium-included Silicon Dioxide (SiO2 + Ti)
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Granite
Phaneritic Igneous Rock (Granite)
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Polished smoky quartz
Quartz (SiO₂), smoky variety
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
Venetian Gold Granite
Phaneritic Felsic Igneous Rock (Granite)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Mixed mineral and rock collection
Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Tumbled pale green quartz (likely aventurine or common quartz)
Quartz, silicon dioxide (SiO₂); green color may result from fuchsite or chlorite inclusions
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
Tumbled jasper, likely red/brown jasper
Microcrystalline quartz (chalcedony), mainly SiO₂, colored by iron oxides
Quartz (Pink/Rose or Hematinoid Quartz)
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartzite with Iron Staining
Metamorphic Quartz Sandstone
Quartz
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Quartz vein in foliated metamorphic rock
Likely quartz-bearing schist or gneiss; visible crystal is quartz (SiO₂)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO₂)
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Blue-gray quartz-rich rock, likely sodalite-bearing syenite or granite
Probable sodalite-bearing nepheline syenite; composition may include quartz, feldspar, sodalite, and dark mafic minerals
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Green Aventurine and Clear Quartz
Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)
Quartz-bearing geode or vuggy quartz specimen
Quartz, silicon dioxide (SiO₂), possibly with chalcedony and iron-oxide staining