This 925 Sterling Silver Natural Ethiopian Opal Gemstone Beads 18" Necklace features black opal stones in round shape with a multicolor display. The necklace is crafted with a lobster closure and sterling silver base metal, making it suitable for various occasions such as engagements, weddings, anniversaries, birthdays, and more. With a total carat weight of 35, this charm necklace is designed in a beaded style with a round link chain type, perfect for those who appreciate beauty and nature-themed jewelry. The opal stones are sourced from Ethiopia and are not enhanced, adding to their natural beauty and authenticity.