Details Nikolle Radi 18k yellow gold & platinum ring with round green tourmaline, size 7 1/2. The filigree bezel-set 3.92ct stone measures approximately 7/16" in diameter. The 18k yellow gold band measures 1/8" in width. - green tourmaline, 3.92ct - 18k yellow gold - platinum - size 7 1/2 Sizing This ring can be resized. Please allow 2 - 4 weeks. Inquire about sizing fee.