Miansai have unveiled this gorgeous iPhone 4 case made of solid gold. It can be purchased either in yellow or rose gold.

Crafted by hand at Miansai, it can be customized according to the client’s tastes. Every case is engraved with its limited edition number. Price: $10,000.

De Bethune has released the Dream Watch IV, an iPhone 4S case that features a mechanical clock as well as protection for your phone… and your brain!

Clearly inspired by the unique piece made for Only Watch 2011 (below), the pocket watch face is made from blued titanium with gold and diamond stars.

The Dream Watch IV also provides electromagnetic protection for the user by reducing the physiological impact of its potentially damaging waves.

Luxury design company Brikk will launch a series of limited edition luxury iPhone cases, profits from which will benefit those in need around the world.

The limited edition collection revolves around the theme of “Altruistic Precision” and is launched with the Trim series of luxury titanium cases for the iPhone 4.

The luxury cases are available in gold, platinum, ‘black DLC’ and ‘grey stealth’ finishes and cost from $3,000 to $4,500.

The Maison Martin Margiela has released this two-piece smartphone holder for autumn/winter 2011 – seen here in brown.

Made from two pieces of richly-coloured leather, the phone holder is lined with a soft and fluffy shearling, mirroring pieces from the Margiela mainline collection.

The holder is the perfect size for an iPhone (both 3 and 4) or a Blackberry, so it doesn’t matter which camp you belong to.

Valentino iPhone case is made from black leather with silver pyramid studs, gold designer stamp and topstitch detail. It features snap-fastening fold-over tab – $245.

Louis Vuitton has released four different cases for the iPhone 4. There is the Damier Azur Canvas, Damier Ebene Canvas, and of course the Monogram canvas cases.

Each one sports an ultra soft microfiber interior, so there is no threat of scratches and is ultra slim so it fits into your pocketbook or pants pocket with ease.

Each Louis Vuitton case retails for $290. It costs almost 50% the cost of iPhone itself but that is the price you pay for style and a luxury brand.