A halo diamond pendant is a necklace that features a central diamond surrounded by a ring of smaller diamonds, arranged in a circular or oval shape. This setting is known as a "halo" because the smaller diamonds surround and accentuate the beauty of the central diamond, creating a halo effect. The pendant itself can be made of different materials, such as white gold, yellow gold or rose gold, to complement the diamonds and create a cohesive look. The halo design creates a stunning and eye-catching effect that is perfect for special occasions or as an everyday statement piece.