Tribal Necklace Carved Bone Beads and More

Tribal necklace I picked up at an estate sale about 5 years ago.. Never wore it so it goes!! Very interesting beads appear to be bone, perhaps onyx and the green beads could be bakelite however I do not want to assume. The silver tone pieces are very lightweight. Not sure if it's aluminum or ? I wish I knew more about this necklace but a great find indeed!! Excellent condition!!