Olo de Boi Crude Stones per kg The Olho de Boi is a stone of luck and protection. The buoy stone combines the protective energy of black with the action force of reddish tones. Boi's eye stone is excellent for strengthening reasoning, inspiration, mental activity, courage and achievement. It is a stone linked to survival and helps to use our power of survival in difficult or troubled times, driving away fear and nightmares. It increases the capacity for leadership and helps in professional and business success. In spiritual terms, the Eye of Boi reinforces our connections with the astral plane.