This pair of studs comes in your choice of chrysoprase or amazonite. Chrysoprase is a semi-opaque to transparent, green-blue variety of chalcedony found in areas such as Australia, Tanzania, Madagascar, and India. Amazonite is pale blue feldspar found worldwide. These 6mm studs feature a simple design that is perfect for easy, every day wear. The wire used in the making of these earrings is a steel-based wire that has been plated with silver and gold toned metals. The wire contains no nickel, lead, or cadmium.