What is white opal?
White opal is a gem with a milky, translucent body, famous for its play of color which reveals shifting multicolored reflections depending on the light.
Where does this gem come from and what are its special features?
This fascinating stone mainly comes from Australia, particularly from the famous Coober Pedy region. Unlike classic crystalline minerals, opal is a mineral that contains water, making it softer than diamond or sapphire.
Its most prized characteristic is its opalescence, an optical phenomenon that diffracts light into a spectrum of changing colors, ranging from pink to green to blue, on a pale or translucent background. As the birthstone for October, it is often chosen to mark a special occasion.
How is white opal highlighted in jewelry?
Lapidaries prefer cabochon cuts, a smooth and domed shape that maximizes the intensity of light play on the stone's surface. Here's how it's typically incorporated into designs:
- Bezel setting: As opal is a relatively fragile stone (5.5 to 6.5 on the Mohs scale), a setting that surrounds the metal all around the gem offers the best protection against impact.
- Alternative engagement rings: For those looking for an aesthetic different from the traditional diamond, opal offers a romantic and mysterious style, associated with Art Deco or organic designs.
- Pendants and earrings: These jewels are subjected to fewer impacts than rings, which allows larger opals to be used safely.
Our jewelers favor a ring creation approach that secures the stone while respecting its delicate aesthetic.
What criteria determine the quality of this stone?
The value of an opal does not depend solely on its carat weight, but primarily on the beauty of its fire. A high-quality white opal displays bright and distinct flashes rather than dull or blurry reflections. Transparency also plays a crucial role: a stone that allows light to pass through while displaying vibrant colors will be more highly valued than a completely opaque and chalky stone.
Elements to observe include:
- Intensity of fire: The vividness of the colors visible against the white background.
- Pattern: The distribution of color patches on the surface.
- Absence of cracks: It is essential to check that the stone does not have cracks due to dehydration.
Frequently Asked Questions About Opal
Yes, but with caution. Opal is softer than other gemstones, so it is best to remove your jewelry during manual or sports activities to avoid scratches or direct impact.
If an opal becomes transparent or temporarily loses its play of color, this can be related to water absorption or extreme dryness. It is crucial to avoid significant thermal shocks and prolonged exposure to chemicals.
The repair is delicate because opal tolerates the heat of a torch very poorly. Our jewelers use specific techniques, such as laser repair or pre-unsetting the stone, to repair a broken ring without damaging the gemstone.