Weathered gray sandstone or siltstone
Clastic siliciclastic rock, primarily quartz and feldspar grains cemented by silica or carbonate
Category
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Weathered gray sandstone or siltstone
Clastic siliciclastic rock, primarily quartz and feldspar grains cemented by silica or carbonate
Weathered iron-rich sandstone or conglomeratic sedimentary cobble
Ferruginous sandstone, possibly polymictic conglomerate
Micaceous schist (likely biotite schist)
Schist dominated by biotite mica, quartz, and feldspar
River Cobbles (Quartzite and Sandstone)
Metamorphosed Quartz-rich Sedimentary Rock
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Blue-gray metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica assemblage; exact identification requires testing
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Mineral
Silicon Dioxide (SiO2)
Quartz Crystal
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Greasy Quartz (likely carved Milky Quartz or Aventurine)
Silicon Dioxide (SiO2)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Quartz (pebble)
Quartz (SiO₂)
Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly crystalline SiO₂, possibly with mica or iron-oxide impurities
Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)
FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Quartzite
Metamorphic Quartz (SiO2)
Quartz (Bull Quartz)
Silicon Dioxide (SiO2)
Tumbled Rose Quartz
Silicon Dioxide (SiO2)
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
Quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂)
Quartzite (River Cobble)
Quartzite (primarily SiO2)
Quartz Pebble
Silicon dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Petrified Wood (Silicified Wood)
Silicified Paleoflora (mainly Quartz, SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Granite Gneiss
Gneiss (High-grade metamorphic rock)
White Quartz
Quartz (Silicon Dioxide, SiO2)
Quartzite Geode (unopened)
SiO2 (Silicon Dioxide)
Quartz-rich hydrothermal ore rock, likely gold-bearing quartz vein
Milky quartz (SiO₂) with iron-oxide staining and probable sulfide minerals; host rock may be schist or altered granite