Vintage 10K Yellow Gold Round Cut Opal & Pink Sapphire Ring. This ring features a round cut opal stone measuring 4.85mm (total of 0.18 carats) and one round cut pink sapphire stone measuring 5.50mm (total of 0.82 carats). The ring is a size 6 1/4 and weighs a total of 1.66 grams. Ring is tested and stamped 10k gold; it is also stamped "Magnolia". This pre-owned vintage ring is in good condition and is ready to be worn!