The Crescent was adopted as the Jewel of the Order. Though any materials can be used in forming the Crescent, the most valuable are the claws of a Royal Bengal Tiger, united at their base in a gold setting. In the center is the head of a sphinx, and on the back are a pyramid, an urn and a star. The Jewel bears the motto "Robur et Furor," which means "Strength and Fury." Today, the Shrine emblem includes a scimitar from which the crescent hangs, and a five-pointed star beneath the head of the sphinx.

http://www.shrinershq.org/