The pendant is 3D - Three Dimensional and reversible.
The pendant is made of Tibetan Silver.
Tibetan Silver is used primarily in jewelry components, and is similar to pewter - an alloy of copper, and sometimes tin or nickel, with a small percentage of pure silver. Its overall appearance is of aged silver, but it can be polished to provide highlights on complex castings. Today, the nickel content is reduced or absent, due to common allergies to this metal.