I prefer the gold one, personally, I do not know if you have more neutral tones though in your wardrobe. If so I would take the first one, just because it seems easier to find colors that will play well with it. However, the silver one would look really nice if you can find colors that will contrast with it.
Which color do you look best in, that is how I usually decide?
But if you are one of those lucky indivduals who look in most to almost all colors, then you are very fortunate!
Good luck deciding, either way the craftmanship on the necklaces is beautiful. If they were handmade, then that is every more impressive.