Sterling silver large open triskele pendant on a 45cm sterling silver belcher link chain. 
The triskele measures approx 26mm.
The pendant is supplied in a Celtic Treasure gift box.

The triskele or triskelion is featured in many Celtic designs. The exact meaning is not clear but some suggested ideas are:
Spirit/Mind/Body     Past/Present/Future   Mother/Father/Child
It may also represent the 3 Celtic Worlds.
The Other World/The Mortal World/The Celestial World.