Luminous deep deep green jade, almost black Chinese jade bangle 58 mm flat inside, 13mm wide. You can see the luminosity as light goes through it. The photo shows how it can be seen at the edges that have less jade to block light.  Rare, from Gansu area, traditional use of this jade is to make cups for tea "gaiwan" set. Made from "leftover" jade exclusively for YYJ.   Yang qi energy for clearing negativity, protection.