Genuine blue sapphire & diamond halo stud earrings. There are 2 genuine blue sapphires that measure about 5mm in size with 16 round diamonds set around them that are about 0.20 carats total weight, SI1-2 in clarity and G-H in color. Earring dimensions are 8mm in size. Available in yellow, white, or rose gold. Sapphire is September's birthstone and the 45th wedding anniversary. This beautiful gemstone symbolizes loyalty, trust, and protection.