Cartier 1960's Diamond Opal Platinum 18 Karat Gold Vintage Halo Ring basilisk Prong set and flanked by

Prong set and flanked by cathedral shoulders bar set with tapered baguette diamonds

eye-clean and white / Stamped VCA for Van Cleef &amp

Designed as an ornately pierced scroll motif crescent-shaped form

Well matched white in body color with strong iridescence and good luster

Cartier 1960's Diamond Opal Platinum 18 Karat Gold Vintage Halo Ring basilisk Prong set and flanked byCentering an oval cut opal cabochon measuring 8. 75 x 13. 5 mm Black in body color with strong blue green play of color Set with yellow gold talon prongs with halo surround Comprised of round brilliant cut diamonds Weighing approximately 0. 54 carats total G H color with VS2 clarity prong set in platinum Flanked by cathedral shoulders Completed by tapered shoulder With high polish finish Stamped for 18 karat gold and platinum Numbered and fully signed