Details Gabriella Kiss 18k yellow gold & oval Mexican fire opal ring, size 7. The 2.5ct stone measures approximately 7/16"x 5/16" & is set in Gabriella's signature scalloped setting. - Mexican fire opal, 2.5ct - 18k yellow gold - size 7 Sizing This ring can be resized. Please allow 2 - 6 weeks. Inquire about sizing fee.