Vintage Diamonds Ruby Sapphire 18K Gold Necklace. The necklace is set with a pear shaped gem ruby measuring 1/4 carat and a gem pear shaped sapphire measuring 1/4 carat. It has 31 round diamonds and 5 baquette diamonds. Combined diamond weight approximately 1 carat. Combined gem weight 1-1/2 carats. The necklace is in excellent conditionguaranteed to please and delight the new owner. It is marked 750 for 18K gold on 2 places and also has a maker's marks next to the locking device. The chain portion of the necklace including the diamonds measures a little more than 15 inches not including the dangling diamonds, sapphire and ruby section. This is a unique necklace and is very beautiful. It weighs 6.8 grams.