What are the risks of purchasing misrepresented gemstones online?

Jul 12, 2019 ... Triplet opals are designed to imitate natural black opal in most instances, and are used and marketed in jewellery as a less expensive alternative to natural ... Aug 14, 2000 ... Triplets are glued together 3 pieces, quartz or plastic top, opal center either natural mosaic or gilson, and base usually of basalt or onyx. The sea ebbs, leaving glistening pools of water among the exposed rocks—a haven for tiny, colourful sea creatures between the tides. Rock Pool is a stone-set ... Strong triplet–triplet annihilation upconversion (TTA-UC) of sub-bandgap ... opal photonic crystal consisting of metal nanoparticles and platinum(ii)- ... This mesmerizing brooch contains a black opal triplet, with excellent play-of-color, that is bezel set and bordered with a twisted rope detail. The opal in this design is a triplet. This means that the opal has a thin layer of clear glass on top of the stone and onyx on the back of the stone. This ... This Pendant Necklaces item by StunningJewelryUsa has 211 favorites from Etsy shoppers. Ships from United States. Listed on Apr 2, 2025. Elevate Your Earring Collection with our 9kt Yellow Gold Opal Triplet 5mm Studs Introducing our stunning 9kt Yellow Gold Opal Triplet 5mm Stud Earrings, ... 9mm x 7mm Opal Triplet by Anderson-Beattie.com Synthetic 9mm x 7mm Colored Glass $683.00 Availability : Instock The opal triplet in this custom designed gold necklace, named “Majestic Northern Lights” by the donors, measures approximately 51.5 x 22.0 x 7.9mm and exhibits ...