If you are looking for an exclusive and eye-catching case for your iPhone 5, you should check out the miniot iWood 5 take a closer look.
Before I get too carried away: the price is 79,- Euro plus shipping (via FedEx, which was really fast) for a phone case is a proud price. And of course it's not a completely impervious case, the wood is hard but not indestructible. So over time there will be wear and tear, but that doesn't detract from the overall look of the iWood 5 cover shouldn't do any more harm. And that iPhone 5 is of course somewhat thicker and heavier due to the cover - but it remains pleasant to use, especially in landscape format it is (for me) somewhat better to grip.
Update from 26 March 2015
In summary I can say: although the Miniot iWood cover not a cheap purchase, but the otherwise replaceable iPhone gets more character. After the release of the iPhone 6 or iPhone 6 Plus, there are also suitable cases for the current Apple model. The price has remained the same, starting at 79,- Euro you get an iPhone 6 wooden case from Miniot.