Montana Silversmiths Earrings - Gleaming Northern Lights/Twilight Earrings ER4294SNPicture the sky at night along the Northern Hemisphere when the electrical lights go out but the sky lights come out to dance along the darkened heavens, those colors are the inspiration for the Northern Lights Collection stones. This round 8 mm Silver Night Crystal stud earring has a deep black with glints of silver white that burst out in a quick flash of light against a night sky. Earrings have hypoallergenic stainless steel post backs.