The Swiss manufacturer produces "luxury communication devices," and its latest creation is described as "high technology in combination with rare materials."
The iPhone 4 case is apparently made from 200-year-old African Blackwood, and finished with an 18-carat gold Apple logo on the back panel. According to Gresso African Blackwood is "a rare, exclusive material of incredible strength and durability."
The company also claims that no two iPhone cases are identical, as the cases are individually hand made.
If you're interested, Gresso offers male and female models, the latter providing engraving and Swarovski crystals. The price? A cool US$3000 for the male model, and $3500 for the female model, but they aren't available until December.