This is an 18 karat white gold genuine blue sapphire and diamond necklace. The approximate 1 carat round, faceted, genuine blue sapphire is surrounded by one half carat of pear-shaped and round, brilliant-cut diamonds that are approximately SI color and near colorless and approximately .35 carats of pear-shaped and round faceted blue sapphires. The pendant part hangs from a 10 karat white gold 16" fine link chain that is attached to rows of pear-shaped blue sapphires that are approximately 1 carat total weight. There is also approximately one carat of round, brilliant-cut near colorless, SI quality diamonds. The pendant is hallmarked on back with FM 86 18K 96. The necklace weighs 12.3 grams (7.9dwt). This is a preowned, estate item and is in very good condition.