Make an impact with dramatic drops of piercing pear-shaped blue topaz (6-3/8 ct. t.w.). Necklace and earrings set in sterling silver. Approximate length: 18 inches. Almost all gemstones and blue and black diamonds have been treated to enhance their beauty and require special care. All gemstone carat weights (ct. t.w.), if mentioned, are approximate; variance may be .05 carat.