Agate
Silicon dioxide (SiO2)
Category
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Agate
Silicon dioxide (SiO2)
Fluorite
Fluorite (Calcium Fluoride - CaF2)
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble (Iron-Stained)
Quartz (Silicon Dioxide - SiO2)
Quartz nodule (River pebble)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Blue Lace Agate
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Citrine (likely Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Amber
Resinite / Fossilized Tree Resin
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Amethyst (Tumbled Stone)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
Blue Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Cloudy Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Variety: Citrine or Tumbled Chalcedony)
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
Aquamarine
Beryl (Be3Al2Si6O18)
Pink Quartz (Rose Quartz)
Silicon Dioxide (SiO2)
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Milky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Milky Quartz
Silicon Dioxide (SiO2)
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
Amber
Organic gemstone (Succinite)
Pink Orthoclase Feldspar with Dendrites
Orthoclase (KAlSi3O8) with Manganese Oxide dendrites
Celestite
Celestine (Strontium Sulfate, SrSO4)
Quartz Mineral
Silicon Dioxide (SiO2)
Calcite (Banded Calcite / Onyx Marble)
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Carnelian
Carnelian (Silica, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz with Mica inclusions (likely Iron-stained)
Silicon Dioxide (SiO2) with Phyllosilicates
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)