Sterling Silver with Gold Raindrop Collar Necklace by Quinn

Vintage sterling silver collar necklace has 26 gold raindrops that are pressed into the silver. It is only marked 925 and don't want to scratch the gold to test it to learn the purity. It is hallamrked Quinn and FS. I cannot get a good shot of the hallmark. It measures 14 1/2" long plus ther opening of 1 1/4". 3/8" wide at center front. Weight: 25 grams.