What are the aesthetic considerations when choosing a backing material color?

Triplet Earrings ... An Opal Triplet is composed of a thin slice of crystal opal sandwiched between a quartz or glass top and a backing made of black potch or man ... Girlfriend Present Natural Black Triplet Opal Pendant Solid 925 Silver 7.88cts ... Australian Opal Natural Black Triplet Opal Earring With FREE JEWELLERY BOX!!! Shop Beacon of Courage Ring II™ in Austrailian Opal Triplet - Designed by Janyl Sherman handmade in Bali Indonesia, this Sterling Silver Chainlink & High ... SKU: 001-270-09683. Three (3) oval triplet opal gemstone (5.23 carats total weight) 10x8mm. $55.00. This mesmerizing brooch contains a black opal triplet, with excellent play-of-color, that is bezel set and bordered with a twisted rope detail. Elevate Your Earring Collection with our 9kt Yellow Gold Opal Triplet 5mm Studs Introducing our stunning 9kt Yellow Gold Opal Triplet 5mm Stud Earrings, ... Jun 5, 2021 ... I love opals, particularly Australian boulder opals. I haven't had much luck with them though. I think I bought them too cheaply and they ... ... triplet states: two states with D1 = 1100 ± 30 MHz, E1 = 244 ± 10 MHz; and ... We have synthesized opal films with the silica spheres size of about 360 ... 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 ... 2” H x 1.4” W (Height includes earwires) OPAL Triplet: The Opal is a hydrated amorphous form of silica and because of its amorphous character, it is classed ...