Details Lola Brooks 18k yellow gold & large oval green tourmaline ring, size 6 1/4. The 16.36ct stone measures approximately 7/8″ x 5/8″ & is set on top of an 18k yellow gold band that tapers from approximately 1/16″ to 1/8″. - green tourmaline, 16.36ct - 18k yellow gold - size 6 1/4 Sizing This ring can be resized. Please allow 4 - 6 weeks. Inquire about sizing fee.