This is one of the finest antique nephrite jade bangles I have had the privilege of offering for sale. It dates from the late Ming/early Qing Dynasty about 1700. Very fine quality material. White hetian nephrite jade is sometimes referred to as "mutton fat". This bangle has a gorgeous fatty luster and silky texture. Superb pierced carving all around. A true connoisseur's piece. More information available at the link below.
https://www.etsy.com/listing/527187225/hetian-jade-bangle-mutton-fat-nephrite?ref=shop_home_active_1