Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a high-quality stone or a bargain in the rough.
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Our IGS opal price guide uses a grading system unique to opals. You can find a full explanation of this system and its terminology in our article on appraising opals. Here’s a brief review:
Opals can still be evaluated in terms of color, clarity, cut, and carat. However, to properly judge their value, you have to consider some factors unique to these gemstones.
Color is the most import factor for evaluating an opal’s value. You must consider the number of colors present, the clarity of colors, the brightness of fire, and the play-of-color…
Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a high-quality stone or a bargain in the rough.
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