Natural untreated Australian boulder opal from Yowah area cut and polished to show its natural beauty. Pendant has 925 silver bail. Dimensions: 20x18x6 mm without a bail. Twisted leather strap 50cm with 5 cm adjustable length. Treatment: untreated. Opal feels cracks in lovely chocolate color base: bright green-blue color in wider cracks, while smaller ones has orange-red colors. Australian opal is a sedimentary variety which is stable, is not affected by contract with any liquids and can last very long time if is used with care.