This pin features gold bering quartz. The pin weighs 17.6 grams. This pin is made of 15k yellow gold. Our collection of vintage and estate jewelry is unique and timeless, makes a great gift, and will be treasured forever. Our GIA-certified Gemologist, Christopher Robuck, has over 40 years of experience in the jewelry business. He thoroughly cleans and inspects each piece, and makes any necessary repairs. When you purchase a piece of our estate jewelry, you can be assured that you are getting an affordable piece of jewelry. Our goal is to price them at 30% to 50% off the regular retail price.