These are AA grade Herkimer Diamond teardrop cage pendants. Herkimer Diamonds have been placed in a sterling silver teardrop cage pendant. The cage and bail are sterling silver with just a touch of rhodium added to prevent, or at least delay tarnishing. Herkimer Diamonds are quartz formations which because of their brilliance and diamond shape have been given the name. Mined only in Herkimer, NY. Herkimer diamonds help release energy blockages and also help enhance dream recall. Really nice!