I've got the perfect autumn set! Vintage 10K Black Hills Gold necklace, stud earrings, and stick pin set! The top of the pin with the leaves is 10K and the pin itself is gold filled. All the rest of the metals are marked and tested as 10K. Weight: 2.6 grams. I took the little safety piece off the bottom of the pin before I weighed them. That piece, by the way, is a bit difficult to get off, but also very secure when on. The chain is 19" long. All tested as 10K, for sure!