The delicate opal birthstone is unique among the colored gems, with refractive qualities that create a rainbow effect, especially when tilted into the light. Most varieties of this non-crystallized silica are ground, rather than facet-cut. The intrinsic reflection of light doesn't need a facet, and the soft stone, which is prone to cracking, is more stable when left uncut. Discover how to pick among the major types of lovely opals.
Things You'll Need:
Reputable dealer
Synthetic and natural light
Documentation of authenticity
Instructions
Look into Harlequin or Fire Opals
Step 1
View harlequin or fire opals set into birthstone jewelry in person, at a reputable dealer's store. Catalog or website photos won't do justice to the opal's signature flashes of color, which require movement to see
Step 2
Ask the dealer whether the stone is natural or has been treated to fill inclusions. Natural stones will have a higher value.
Step 3
Pick an opal in the fine-jewelry setting of your choice or a more rustic piece, such as a polished boulder opal left in its natural shape.
Select a Common Opal
Step 1
Pick a common opal that is thickly ground, especially when it is to be used in a ring setting. These will be less likely to suffer chips and scratches.
Step 2
Select pale common opal jewelry that complements your complexion. View it in various lighting situations before buying.
Step 3
Visit the International Colored Gemstone Association website for more information about opals
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