Thorsten Rings Pulsar Black Ceramic Wedding Ring with Emerald Green and Sapphire Blue Opal Inlay and Polished Beveled Edges Comfort Fit Lightweight Durable Wedding Band - 8mm Hypoallergenic, Durable and Heat Resistant Black Ceramic Comfort Fit Great For Both Men & Women Great Wedding Ring or Promise Ring Free Shipping, Free Lifetime Warranty, Free Lifetime Sizing Opal is known as the gem of brilliance and mystery and Sapphire is known as the gem of sincerity and trust.