Unicorn’s Horn Opal Pendant: the UniHORN 3.0An Australian opalised FOSSIL opal from Lightning Ridge, NSW. Fossil opals are prehistoric plant or animal particals that have been opalised over millions of years, just like this Unicorns Horn Opal pendant: The UniHORN 3. 0 Fossil opals are often brighter and STRONGER than your typical opals, as its the actual wood plant that has been opalised over millions of years (so not just pure silica water, but silicon AND organic matter). They often have a