Antimony is a silvery grey metallic substance that was used in the Middle Ages in alchemy to extract the gold within base metal.  It represents the wild, untamed nature in humankind as symbolized by the wolf and is often referred to as the Grey Wolf and psychologically. 

Antimony stone promotes change and transformation in the wearer.  Yet it is also considered "the natural son or daughter of Saturn" helping to contain and channel the wild, animal energy into responsible and spiritual maturity.  Its properties enhance self confidence and restore courage as well as protect and purify harmful toxins.