It would be helpful to know where you are, in order to steer you
to an appraiser. But here are some general tips:
-in the US, call 1 800 USA VALU, for the American Society of
Appraisers, they will refer you to an ASA member in your area.
-The International Society of Appraisers, now in Seatle, WA,
will also do this, though not as quickly, I’m afraid.
-you want a Graduate Gemologist (GIA).
-not everyone knows opals.
call, get more info. on their credentials, get the price, make
Yes, yes, you can send it to GIA, but that’s more expensive,
takes a long time, and they won’t give you a value. GIA Gem
Trade Lab is wonderful when you need it, but most of the time
your local appraiser will suit just fine.