Image courtesy of the London Fair.

Chanel’s creative director, Karl Lagerfeld, has designed a diamond collar worth $45K for inclusion in an upcoming jewellery exhibition celebrating the Queen’s Diamond Jubilee year.

The elaborate item features 40 carat black diamonds, which frame a 23.33 carat emerald centrepiece set in black “rhodium-plated” silver.

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Lagerfeld is no stranger to excess – the design master owns 70 ipods, has designed a custom helicopter and his beloved kitten, Choupette, reportedly has two maids to itself.

But while his lifestyle may seem excessive, proceeds from the sale of the black diamond collar will reportedly go towards the children’s cancer charity, CLIC Sargent.

“I'm renowned for my love of a high collar and I wanted to create a true collector's item with this one-off piece,” said Lagerfeld. “Merging the masculine with the feminine and uniting the world of fine jewellery and high fashion, to me this collar is a work of art and a real show-stopper.”

The curator of the exhibition, Carol Woolton, added that Masterpiece London, where the collar will be on display before it goes on sale, already houses some of the best antique diamonds in the world.

“This was a way to add contemporary diamond design into the fair,” Woolton added. “Diamonds have something magical about them - it's hard to define, but you recognise it when you see it. When this magic and ephemeral sparkle is combined with a strong design then I believe something of great power is created."

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Video courtesy of www.net-a-porter.com/.