Australian Opal Type Identifier

Australian Opal Type Identifier

Not sure what kind of opal you're looking at? Answer 4 quick questions and we'll narrow it down — boulder, crystal, black, white, or possibly a doublet/triplet.

1. What does the body of the stone look like?
2. How does the opal layer behave?
3. Where is it from? (If known)
4. What does the play-of-colour look like?

Best match

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This identifier is a starting point — not a gemological certificate. Final identification should always come from an independent appraisal for valuable stones. For a full primer, read our complete guide to Australian opals.