Swarovski Elements crystal A/B (Aurora Borealis) stone. The chain is Fancy Link 18 inches long. Finish: Rhodium overlay. Star measures 20 mm in size. Check my other postings for the heart, moon and briollette. More than 60 years ago, Swarovski and Christian Dior created the iconic Aurora Borealis Crystal. It blends the original rainbow-hued, refracted light effect with a mercurial, futuristic gleam—in modern nature-tech hues. Aurora Borealis means Northern Lights.