This brilliant Boulder Mountain Australian Natural Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, blue, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!
Known as the October birthstone and the Zoduac sign of Libra, the opal was first recognized by the American National Association of Jewelers in the year 1912. The metaphysical properties of Boulder Opal include faithfulness, enhancement of inner beauty and aid in recalling past lives. It is found in Australia where precious opal forms in patches and veins within brown ironstone boulders. When the opal is mixed throughout the ironstone, it is called the matrix . Hardness ranges between 5.5 and 6 on the Mohs scale. Boulder opal is very durable due to the ironstone backing that the opal forms on. Because the water content within the opal is very low, it rarely cracks.