Our collection of Black Opal Necklaces feature 100% genuine earth mined Opals. Our range of Black Opal Necklaces and Pendants feature bright colors including Fire Opal Necklaces, Red Opal Necklaces, Blue Opal Necklaces and Green Opal Necklaces. The birthstone for October birthdays, Australian Opals are a must for any jewelry collection. 30 Years of Experience. Thousands of customers. Fast, Easy & Direct worldwide shipping makes purchasing your own piece of Opal direct from Australia easier than ever before!