4.0Carat Square Blue Zircon Hook EarringsProduct Specifications This drop earring is a magnificent and elegant piece of jewelry. The earrings are made of sterling silver material and are crafted with exquisite craftsmanship. making them smooth and durable. The earrings are embedded with a 4 carat blue square zircon. forming a simple and elegant single solitaire pendant. The biggest feature of this earring is its halo effect formed around white small zircons. When light shines on the earring.