After designing Apple’s iPod, iMac, MacBook Air, iPhone and iPad, Jony Ive, the technology company’s British chief design officer, has now created a diamond ring, which will be sold in aid of charity.

He has collaborated once again with revered Australian industrial designer Marc Newson on the project in aid of (RED), a non-profit organisation that teams up with iconic brands to raise money to fight HIV and Aids in eight African countries.

The ring is expected to sell for between US$150,000 and US$250,000 when it goes under the hammer at Sotheby’s online (Red) Auction, which is now open for bids up until December 8.

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Inspired by the unibody design of Apple’s MacBook notebook computers, the diamond ring has been cut from a single diamond, with some of its facets measuring less than a few hundred micrometers.

The centre of the ring will be custom-finished later, using a high-powered one-micrometer-thick water jet and laser beam.

It will be cut and smoothed so that it perfectly fits the finger of its new owner – up to a United States ring size of 5, equivalent to an inner diameter of 0.618 of an inch (15.7 millimetres), or a finger circumference of 1.944 inches (49.3 millimetres).

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When it is finished the ring will feature between 2,000 and 3,000 facets, a feat that has never been achieved on a single diamond.

In the past, Ive and Newson have collaborated on items, such as creating an aluminium-clad work desk, a retro-looking Leica camera and a one-of-kind red MacBook Pro, with all of the items auctioned to raise funds for (RED).

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This article originally appeared on  Luxurylaunches .