Nothing says "offensively rich" like a limited-edition gold phone, and that's exactly what Sony is saying with its special limited-edition version of the Xperia P smartphone.

"We’re always looking at new ways of working with different materials - during a recent creative session, we were throwing ideas around at what we could do to highlight Xperia P’s sleek unibody design and aluminium back cover… And, what better than gold; 24k’s worth to be precise," the company said on unveiling its most indulgent handset.

15 24k gold sony xperia p phones up for grabs in facebook comp image 2

What's even better is that Sony is giving 15 of the gold-cased Android phones away via its global Facebook page. They'll be the prizes in a worldwide treasure hunt that starts this week.

It has yet to announce the final details but asks people keep an eye on the Sony Mobile Facebook page to find out more.