Doublet

A doublet is a type of gemstone composed of two pieces that are fused together, often to enhance its appearance or durability.

Part of speech: noun
Definition: In jewelry terminology, a 'doublet' refers to a composite gem made by gluing a slice of a valuable gemstone onto a piece of less expensive material. This method is commonly used to enhance the perceived value of the gem or to make it more durable for use in jewelry. For example, a thin layer of opal might be attached to a piece of black onyx, giving the opal enhanced color contrast and a sturdier base. Doublets offer a cost-effective alternative to buying a solid gemstone, while still providing much of the aesthetic appeal and uniqueness of the natural stone. They require special care to prevent water from seeping into the layer joint, which can affect the stone's appearance and integrity.