Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Quartz (Yellow/Citrine variety)
Crystalline Silicon Dioxide (SiO2)
mineral
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz (with inclusions / Sandstone fragment)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz with Calcite/Quartz Veining
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon dioxide (SiO2)
mineral
Smoky Quartz (Faceted Beads)
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Vitreous Volcanic Glass (Siliceous Obsidian with Cristobalite inclusions)
igneous
Quartz (Quarzite or Massive Quartz vein)
Silicon Dioxide (SiO2)
metamorphic
Green Aventurine (Propably a tumbled variety)
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Grey Quartz Variant)
Silicon Dioxide (SiO2)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Obsidian (Gold Sheen)
Obsidian (SiO2 + impurities)
igneous
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite with Iron Inclusions
Quartzite (primarily SiO2 with Fe2O3 impurities)
metamorphic
Yellow Quartz (Citrine or Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled/Polished Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary