Opal is a Gemstone that is ruled by the Planet Venus, cold in nature and has been used for centuries as a substitute for Diamond due to its shine and luster. It is said to protect the wearer from negative energies from various celestial bodies and also helps them achieving Wealth, Pride and Wisdom. Wearing Finger: Ring Finger of Right Hand or can also be worn in the form of Pendant. Jewellery Metal: Opal should be best if made in Silver. Wearing Day: Friday or Saturday in the afternoon. Cautions: One should remove and get a new one if the Gemstone get cracked and incase it dont suits you. (Consult your astrologer).