Genuine 925 Sterling Silver Navratan Ring Gemstone - Ruby , Emerald , Blue Sapphire, Yellow Sapphire, Hessonite, Cats Eye, Coral, Pearl, Cubic Zircona. Ring Size - QTY - 1 piece in this listing. The navratna or nine gems influencing the nine planets are: Ruby = Sun , Pearl = Moon, Red Coral = Mars, Emerald = Mercury, Yellow Sapphire = Jupiter, zircon = Venus, Blue Sapphire = Saturn, Hessonite = Rahu , Cat''s Eye = Ketu .