1960's Diamond & Blue Sapphire Platinum Circle Pin Brooch

1960's diamond and sapphire brooch handcrafted in platinum. The pin features 12 round brilliant cut diamonds weighing approximately 3.00 carat total weight and graded G-H color and VS2-SI1 clarity. The diamonds alternate with 12 oval sapphires weighing approximately 6.00 carat total weight. The pin measures 40 x 40mm. Weight: 11 grams.