Hi Jacob, welcome to the forum. Nice Bali keris. Authentic? Certainly. Looks to me to be mid -late 19thC, but it could be a bit older. Nice silver diety hilt. Most of the stones look real on there, including low-grade ruby and sapphire, and some other semi-precious stones. The mendak (hilt ring) looks like a newer addition and the "stones" there may be glass. The metal here is probably brass.The metal sheath cover appears to also be silver and is nicely repoussed. Nice blade as well. It could use a etch and restaining to raise the pamor pattern. All in all pretty nice. I certainly wouldn't mind owning it.