Halo is actually a stone setting on the ring, a placing that contains diamonds or other valuable stones encircling the main stone. M on a ring denotes Milor, that's an Italian silver jewelry manufacturer. 925 signifies that the jewelry is product of sterling silver. TK316 is short for TUSK Stainless-steel, https://trentonocnyi.life3dblog.com/35689661/a-simple-key-for-jp88-unveiled