Antique solid 10k yellow gold necklace with lavalier pendant. It is set with a red ruby that tests as corundum. I am not sure it is it natural or synthetic.  It is set with natural seed pearls. Some have turned dark with age. It also has a dangling fresh water pearl. There may have been two more at one time hanging from the loops up higher on the pendant. Necklace is 17 1/2" long. Weight: 3.2 grams. C. 1915