Vintage Gorgeous Necklace Midnight Black Round Beads and Antiqued Metal Beads

No makers marks or anything but the clasp looks regular vintage (no earlier than 60’s - 80’s era is my guess. The necklace is fairly weighty as are the round black beads that I’m guessing are maybe glass or polished gem or stone and completely amazing looking. The “antiqued” silver tone beads also have a bit of weight to them as well and really set off those black pieces. The silver tone may be tarnished though it looks more intentional than that to me. If you know anything about the piece, I’d love to hear from you about it. 😘