This is a magnificent handmade sterling silver necklace. The chain pattern is intricate, much like a puzzle. Necklace has a four-sided clasp set with natural stone. I have never, ever seen anything like it. It is chunky and secure. You can wear the clasp in back or along one side so it shows. Necklace is not marked but tests sterling. The weight is off my scale but I was told when I purchased it that it weighs 115 grams. It is about 20 1/2" long and 8.6mm wide. I have not cleaned this necklace so it retains old patina. It is in excellent condition.