Revered as a symbol of hope, fidelity, and purity, opal was dubbed the Queen of Gems by the ancient Romans because it encompassed the colors of all other gems. Opal is prized for its unique play of color, the ability to diffract light into flashes of rainbow color.

Opal, with or without enhancement, should be treated with some care. Opal is softer than many other gemstones and should be stored carefully to avoid being scratched by other jewelry. It should also be protected from blows, as exposed corners can chip. Get more information about opal here.

 FACTS

MINERAL: Hydrated Silica
CHEMISTRY: SiO2•nH2O
COLOR: All colors
REFRACTIVE INDEX: 1.37-1.47
BIREFRINGENCE: None
SPECIFIC GRAVITY: 2.15 (+0.08, -0.90)
MOHS HARDNESS: 5 to 6.5

Source AGTA, GIA

 **Opal, with or without enhancement, should be treated with some care. Opal is softer than many other gemstones and should be stored carefully to avoid being scratched by other jewelry.