Details Lola Brooks 18k yellow gold & rectangular portrait-cut blue green tourmaline ring, size 7 3/4. The 3.41ct stone measures approximately 1/2″ x 1/4″ & is set on an 18k yellow gold band that tapers from approximately 1/8″ to 1/16″. - tourmaline 3.41ct - 18k yellow gold - size 7 3/4 Sizing This ring can be resized. Please allow 4 - 6 weeks. Inquire about sizing fee.