Flickering Gem Colors 28ct Australian Solid Fairy Boulder Opal Barrel Bead. 18.5mm x 16.0mm diameter. This australian solid fairy boulder opal barrel bead has vibrant gem colors of red, orange, green, crimson, violet, yellow and turquoise.The colors flash and fire beautifully with rotation of the opal with the reds standing out the best and there is also play of color. The opal has been set with sterling silver (stamped 925) ends. The hole is 4mm in diameter. This solid fairy boulder opal has been mined from the Queensland boulder opal fields and is found above the ironstone layer of the boulder opal. The body of the opal is sandstone which has been treated with inert chemicals (non toxic) which darkens the stone and helps show the natural gem colors that are there. The dark body tone is through the whole opal and not only on the surface. The opal has been stabilized which increases its strength upto 10 times. The whole is 4mm in diameter. We pride ourselves in offering you boulder opal with bright gem colours. We go the extra mile to offer top quality opals in all price ranges. The item "Flickering Gem Colors 28ct Australian Solid Fairy Boulder Opal Barrel Bead" is in sale since Monday, June 11, 2018. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Boulder Opals". The seller is "opals-downunder" and is located in Menai, NSW. This item can be shipped to North, South, or Latin America, all countries in Europe, China, Japan, Australia.