Trapezoids, or "Traps" are probably the most popular side stones used in jewelry. The term trapeze is probably derived from the flying trapeze made famous in the circus.
Trapezoids work best with elongated or very large stones. Step cut trapezoids work great with Emerald or Asscher cut, while Brilliant cut trapezoids are usually matched with radiant or princess cuts, as well as with colored diamonds and gemstones.