An Australian opal with the weight of 3.50cts and the dimension of the piece is 8×16×4. A perfect pendant or a ring piece for gift to love. Opal is Gemstone for lover's if lost your love and want to get it back. Opal is one of the world's most beautiful and precious gemstones, predominantly found in Australia. It is one of only six types of precious gemstones found on planet earth, sharing prestigious company with diamonds, rubies, sapphires, emeralds, and pearls. Over 95% of the world's precious opal comes from Australia, and opal is Australia's national gemstone. While several different types of opal are present in nature, there are two main varieties - precious opal and common opal or potch. Precious opals exhibit the characteristic play-of-colour, and is comparatively rare. Opal which is dull and valueless is called common opal.