Sparkling little Herkimer diamonds hang from nickel free antique brass circle chain on nickel free brass ear wires. These earrings measure around 3 inches in total length and are extremely lightweight. Herkimer diamonds are not actually diamonds but double-terminated quartz crystals that were discovered around Herkimer county in New York state. These are extremely clear and offer a gorgeous sparkle. They are considered a powerful quartz stone believed to amplify spiritual energy and aid in physical healing.