Australian Opal Australian Doublet Opal Earrings set in 925 Sterling Silver 10.65 ct Cubic Zirconia Classified by the Opal industry as Natural Opal Type 1 Genuine Australian Black Opals are the most valuable and popular of all Opals and account for around 5% of Opals and is found at Lightning Ridge in Northern New South Wales. https://vimeo.com/240759440