The lab opal cabochons are a beautiful iridescent color with flashes of green, yellow, and blue. The stones are set in a bezel setting, which helps to protect them and keep them from chipping or scratching. The posts are made of sterling silver, which is a durable and hypoallergenic metal. The rubber clutches help to keep the earrings securely in place. These earrings are perfect for everyday wear, and they would also make a great gift for a special occasion. They are sure to be a cherished piece of jewelry for years to come.