Clear Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Jasper Rose Quarts / Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
Graphite-rich schist (probable graphite ore)
Graphite schist; chiefly graphitic carbon (C) with quartz, mica, and possibly feldspar
Colorless faceted gemstone, likely cubic zirconia
Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond
Milky Quartz
Silicon Dioxide (SiO2)
Orange Calcite (with White Calcite/Quartz matrix)
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
Brecciated Jasper or Chert
SiO2
Iron-rich sulfide ore, likely pyrite-bearing gossan
Pyrite (FeS₂), possibly mixed with iron oxides/hydroxides and other sulfides
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Veined quartz-bearing metamorphic rock
Likely quartzite or siliceous schist with iron-oxide staining
Cloud Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Likely quartz-rich metamorphic rock (quartzite or quartz-veined schist)
Quartzite/siliceous schist; chiefly quartz (SiO₂), with probable mica and iron-oxide staining
Likely weathered sandstone or iron-rich chert fragment
Indeterminate; probable quartz-rich sandstone (SiO₂) with iron-oxide cement, possibly chert
Sandstone
Sedimentary rock composed mainly of quartz sand
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO₂)
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Quartz with Host Rock
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Fossil-bearing sedimentary rock, possibly fossil wood or bone
Indeterminate silicified/carbonate fossil in sandstone or mudstone
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Iron-rich quartzite or silicified ironstone
Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite and possibly hematite
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Limestone with Calcite Veins
Calcium Carbonate (CaCO3) - Sparry Limestone
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Sandstone (Water-worn pebble)
Sedimentary Rock (Quartz arenite)
Quartz Geode
Silicon Dioxide (SiO2)
Epidote
Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Sandstone
Clastic Sedimentary Rock (Quartz arenite)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Quartz (Variety: Rock Crystal Cluster)
Silicon Dioxide (SiO2)
Quartz (Milky or Clear variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)