Chandra is a Hindu god of the air- of the firmament, really, the earth, sky, moon and stars.
The elements are intended to denote the sphere of the earth, the moon, the star. The metal imagery is a little unusual; I am using Copper to signify the Earth (she is a watery planet, after all) Gold for the (Full) Moon, and the ethereal whiteness of Silver for the glimmering Star.
This wand is concieved as a triangular shape, and can be extremely massive at the butt end.