4.24 Paraiba Tourmaline & Diamond Ring PlatinumThis engagement ring features a 4. 24 carat oval cut Paraiba tourmaline and 1. 06 carats of accent diamonds in platinum. The center tourmaline displays the vivid neon blue green color that defines Paraiba stones. Set in a four prong basket, the oval tourmaline is flanked by two (2) . 53 carat Cadillac cut diamonds that frame the center stone with geometric precision. The white diamonds bring contrast to the electric blue of the tourmaline. Finished on