10K Yellow Gold Ruby & Diamond Ring Size 6 3/4. Fun and unique piece that combines beautiful diamonds and rubies. There are 10 diamonds, approximately 0.3 ctw, and 18 rubies, approximately 0.36 ctw. all set in 10K yellow gold. Perfect for everyday wear with its low profile. It is a size 6 3/4 and weighs 2.78 grams. Very few signs of wear, this piece almost looks brand new!