Pyrite, long valued for attracting wealth! It is also a  strong protection stone that shields the wearer from negative energy and enviromental pollutants. Helping promote physical well-being aswell as stimulating  chakras, pyrite enhances strength of mind and willpower. Within its gleaming beauty is a stone of hidden fire, one that can be sparked to life by striking it against metal or stone. 
The moon charm is reminding you of natures balance, gold filled, 20 times more tarnish resistant than gold plate.