Vintage Jewelry Faux London Blue Topaz Cabochon and Gold Tone Criss Cross Necklace Pendant. In good vintage condition does have minor metal wear as shown in the pictures but this is a beautiful blue stone necklace pendant! The pendant is reactive to light so I tried to show it in natural light and sunlight to show the variations. Measures approximately 1 1/2 inches. Shipped with USPS First Class Mail.