Answer
(Fatwa: 1207/916/H=1431)
(1) Visiting an astrologer is haram, and confirming him is feared to cause kufr.
(2) It is not lawful to wear the ring given by him. If someone predicts that the astrologer must die, can he remove the danger of his death by wearing the ring? How many astrologers have solved their problems of death? Had it been so, no astrologer of the world would ever die. Reform yourself by doing true tauba.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband