Plume Agate
Silicon Dioxide (SiO2)
Category
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
Plume Agate
Silicon Dioxide (SiO2)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
White Quartz
Quartz (SiO2)
Amethyst
Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities
Sandstone (Quartzose)
Arenite (SiO2 principal)
Banded Calcite (often sold as Mexican Onyx)
Calcium Carbonate (CaCO3)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Satin Spar (commonly sold as Selenite)
Hydrous Calcium Sulfate (CaSO4·2H2O)
Milky Quartz
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silica / Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Cat's Eye Moonstone (Feldspar)
Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
Blue Chalcedony
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz Pebble)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Jasper with Quartz
Silicon Dioxide (SiO2) - Chalcedony variety
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Sunstone
Oligoclase (Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8 with Hematite or Copper inclusions
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
Tree Agate (Dendritic Agate/Quartz)
Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Red Jasper
Jasper (Silicon Dioxide with iron oxide inclusions), SiO2
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
Agate
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Dendritic Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)