Sterling Silver 15MM Hawaiian Plumeria with Lab-Created Semi-Precious Blue Topaz Post Earrings. 5/8' in diameter with Lab-Created Semi-Precious Blue Topaz on the petals of the Plumeria Flower. These earrings are made with Sterling Silver and Rhodium finished to avoid tarnishing. Always appropriate and gorgeous, These earrings are a timeless classic, and they belongs in every jewelry wardrobe.