Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Weathered foliated metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and mineral tests
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sandstone
Clastic Sedimentary Rock
Sandstone
Sedimentary Clastic Rock
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Sedimentary rock composed mainly of quartz sand
Sandstone
Clastic Sedimentary Rock
Quartz (pebble)
Quartz (SiO₂)
White Quartz
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Mixed River Pebbles and Jasper
Siliciclastic sediment and microcrystalline quartz
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble (Tumbled / Beach Pebble)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities and white quartz bands
Quartz Pebble
Silicon Dioxide (SiO2)
Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Clastic Sedimentary Rock
Yellow Quartz / Citrine Pebble
Silicon Dioxide (SiO2)
Chert / Quartzite
Silicon Dioxide (SiO2)
Sunkissed Quartz or Hematoid Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Green Quartz (Prasiolite)
Silicon Dioxide (SiO2) with trace impurities
Quartz on Host Rock
Silicon Dioxide (SiO2)
Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
Druzy Quartz on Chert/Siltstone
Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix