Details Gabriella Kiss 18k yellow gold & octagonal green tourmaline slab ring, size 6 3/4. The 4ct stone measures approximately 1/2" x 1/2" & is set in Gabriella's signature fine bezel setting. - tourmaline, 4ct - 18k yellow gold - size 6 3/4 Sizing This ring can be resized. Please allow 2 - 6 weeks. Inquire about sizing fee.