Women's Sterling Silver Halo London Blue Stud Earrings Rhodium Plated.   Women's London blue oval cut synthetic spinel stone is surrounded by clear round-cut cubic zirconia stones to create a halo design.  The women's stud earrings are designed in 925 sterling silver with a white gold rhodium plating and a high polish finish for extra protection and shine.  The stud earrings are fastened by pushbacks on each post.