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![How To Value Opal - The 10 Factors [Guide] | Opal Auctions](https://df2sm3urulav.cloudfront.net/tenants/oa/uploads/content/59683c445b98d.jpg "How To Value Opal - The 10 Factors [Guide] | Opal Auctions")
How To Value Opal - The 10 Factors [Guide] | Opal Auctions
Opal Stones and Gems: Value, Price, and Jewelry Information - IGS
How to Assess the Value of an Opal: A Beginner's Guide to Pricing
