Australian Boulder Opal Earrings Hammered Earwire Sterling Silver. Boulder opal is mined only in Queensland Australia.A layer of precious opal covers an actual rock or boulder, thus its name. You can see the ironstone peeking through this colorful, beautiful face. Nicely cut into rectangles and polished to beautiful glossy finish. A simple ear wire with a bit of hammering is all this pretty stone needs to be showcased as a OOAK Beauty! Hand cut & polished Boulder opals 18 x 10 x 5mm - sterling silver wire & components - 2 inches total dangle - sterling silver earwires. Jewelry designs are original and are COPYRIGHTED & OWNED by OLENA DESIGNS. Unauthorized use, duplication, and/or modification in whole or in part is prohibited. The item "Australian Boulder Opal Earrings Hammered Earwire Hoops Sterling Silver" is in sale since Wednesday, April 24, 2019. This item is in the category "Jewelry & Watches\Handcrafted, Artisan Jewelry\Earrings". The seller is "olenadesigns" and is located in Chicago, Illinois. This item can be shipped worldwide.