Luck and Power! This 13.1 Argentium sterling silver charm paired with a green tiger's eye gemstone, four leaf clover and 16" leather necklace is a powerhouse combination! Tiger's eye is known to help with balance, vitality and willpower. Argentium silver (.935) is known for less tarnishing so when combined together, this is a sure compliment catcher. Great way to show off your Shamrock half marathon race!