Gresso has created a luxury back cover for the iPhone 4 that is made of 200 year old African Blackwood along with 18K gold detailing.

The back cover aims to make your iPhone 4 look a little different although it isn’t clear if the wood used is a replacement or cover for the current glass used.

Two versions are being created. The first is for women and contains an Apple logo in 18K gold along with Swarovski crystals. This version costs $3500.

The other version for men drops the crystals and just has the wood back with Apple logo and costs $3000.

The new iPhone 4 collection from Gresso will be available in December 2010.