Blue Sea Opal EarringsBlue Sea Opal Earrings. The blue sea opal earrings each have beautiful Blue irridescent sphere measuring approximately 8mm with a smaller 3mm Sea Opal Sphere and a 5mm Silver Rose Bead and one Silver Collar. Sea Opal is made with abalone shell. These earrings were made in America, they were designed and artfully handcrafted by Jeanette S. Jeannette is a Native American of the Dine' (Navajo) Tribe. Each sea opal earring measures approximately 1 inch in length, 1 3/4 inches in length including the sterling silver french hooks. You will appreciate the beautiful, unusual marbling and iridescent colors of these earrings. This item is shipped with a signed Certificate of Authenticity and/or a Spiritual Meaning Card.