Black Diamond crystal surrounds 12mm rhinestone earrings. To get an idea of the size refer to the ear pic above. Settings…Silver colored Plate over Brass Posts…solid hypo-allergenic surgical steel. Backs…Large plastic & surgical steel Earrings come to you carded & in my cotton filled gold embossed gift boxes. From our different pics you can see how the same earring can appear different colors in different lighting conditions & when simply viewed at different angles.. These ever changing color effects are what make crystals such interesting & captivating jewelry pieces. SEE THE REST OF OUR JEWELRY COLLECTION AT Black Diamond Earrings, & & Silver Studs, 12mm Halo Crystal Studs