Matt Borgatti handcasts these elegant candles from actual impala horns. They're just $17 in the Boing Boing Bazaar! From his product description:
I created these fine unscented wax candles for wizards, lovers of the macabre, and anyone who appreciates the subtle organic beauty of horns...Impala Horn Candles
These candles have about a four hour burn life and are made of a low drip translucent amber wax. They have a tall flame with a pleasant glow. They are self supporting, being cast with their own bases, but will work with candle stands intended for pillar candles.
Each order contains a pair of candles (one left hand spiral horn and one right hand spiral horn) measuring roughly 10" high with a 3" dia. base.