This is a beautiful vintage piece of silver and jet Navajo jewelry. On each of the two end pieces BB is stamped. After much searching I find this is the work of Bobby Becenti, a pre-eminent Navajo silversmith. It is exquisite in its simplicity.
The size of the largest stone is 1.125" long and sits in a silver surround of 1.75". The weight is approximately two ounces or 56.7 grams.
Thank you for looking.