Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Tumbled banded metamorphic stone
Likely banded gneiss or migmatitic gneiss; exact identification requires testing
Banded Gneiss
Gneiss (High-grade metamorphic rock)
Quartzite with Iron inclusions
Quartzite (SiO2 with Fe2O3 trace impurities)
Mica Schist
Mica Schist (predominantly Muscovite/Biotite Schist)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Gneiss
Metamorphic Rock (Gneissic texture)
Tumbled gray-green metamorphic rock, likely serpentinite or chlorite schist
Serpentinite/chlorite-rich ultramafic metamorphic rock; commonly dominated by antigorite, lizardite, or chlorite with minor magnetite and talc
Pyrite in Matrix
Iron Sulfide (FeS2) embedded in host rock
Quartz (Milky Quartz / Quartz Specimen)
Silicon Dioxide (SiO2)
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
Banded Agate (Polished Slice)
Chalcedony (cryptocrystalline Quartz), SiO2
Milky Quartz
Silicon Dioxide (SiO2)
Quartz-bearing rock fragment
Likely quartz (SiO₂) with iron-oxide staining and possible host-rock grains
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
Pale blue-gray quartz-rich pebble (tentative)
Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Schist
Schist (variety likely Mica Schist)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
Galena
Lead(II) sulfide (PbS)
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss (with Granite/Pegmatite Vein)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)
Granitic gneiss (weathered, rounded cobble)
Foliated granitoid; primarily quartz, feldspar, and mica (composition commonly approximates granite)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
Common Quartz Pebble
Silicon dioxide (SiO2) rock fragment
Schist (Greenschist / Mica Schist)
Schist (variable mineral composition, commonly containing quartz, feldspar, mica, chlorite)
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
Quartz on Host Rock
Silicon Dioxide (SiO2)
Gneiss
Metamorphic Gneiss
Mixed tumbled gemstone collection
Varied minerals, likely including amethyst, sodalite/lapis lazuli, quartzite or aventurine, jasper, and agate/chalcedony
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)