If you are a fan of vintage jewelry, you will love the Andrea Design Blue Sapphire Engagement Ring. This ring has achieved the elusive timeless status. It has a blue sapphire, which weighs 0.52ct, in the center. This is then surrounded by Round Cut Diamonds that are channel set on a feature band. The small diamond weight of this ring is roughly 0.38ct in total. You can order it in platinum, 18k yellow gold, or 18k white gold.