Image 1 of 2 Image 2 of 2 10k Yellow Gold London Blue Topaz & Diamond Filigree Pendant $350.00 2.0 GramsLondon Blue Topaz=3.87ct. 3 Diamonds=0.01 cttw. Add To Cart Added! 2.0 GramsLondon Blue Topaz=3.87ct. 3 Diamonds=0.01 cttw.