Nokia's luxury phone subsidiary, Vertu has shown off their new Coloured Diamonds Collection, the latest editions to join the Vertu Signature line of handsets inspired by 'haute joaillerieÃ' and Grand Complication timepieces.

Both of the new variants - Signature Rose Gold Pink Diamonds and Signature Rose Gold Pink Sapphires - takes VertuÃ's skilled craftsmen one month to hand-set, using a combination of 18 Carat Rose Gold and pink diamonds, pink sapphires and rubies of the highest quality.

The company says that eight designers spent a total of four years perfecting the feel of the keypad. It can take one of VertuÃ's craftsmen up to three years to learn how to assemble a Signature. This latest Coloured Diamonds Collection is a contribution to VertuÃ's vision to create the finest handsets in the world.

"Signature is a very special collection for Vertu," said Chris Harris, Global Marketing Director. "It was our first handset and as such is where we continually strive to achieve the highest possible standards of design, craftsmanship and exclusivity. These two new additions, which include very rare gems such as pink diamonds and sapphires, are fitting additions to this iconic range".

The Signature Rose Gold Pink Diamonds contains 923 precious stones, with an average of 7.2 carats on each phone.

These pink diamonds are very rare and are only found in the Argyle mine in Australia. The Signature Rose Gold Pink Sapphires contains 385 stones, with an average of 2.1 carats on each phone. Each stone is unique in size and shape, and is chosen specifically to fit the pattern on each handset, making every piece unique.