An eye cameo, hand-carved in Brazilian blue agate, sits within a diamond-encrusted, 18k yellow gold pendant in this head-turning design. The diamonds that embellish the necklace are inverted, for a smooth, tactile look, intended to represent a sea urchin. The necklace is also set with a white diamond within a sea urchin charm along its 17-inch, 18k yellow gold chain.