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Tiffany & Co. is asserting its expertise in high jewelry by revealing its most expensive piece ever, WWD reports.

The World’s Fair Necklace was unveiled Sunday at a Tiffany event in Dubai, United Arab Emirates, and is bejeweled with a total 180 carats of diamonds, all set in platinum. At its center is an 80-carat oval shape, D color and internally flawless diamond that Tiffany has christened “The Empire Diamond,” named for the New York City icon in the jeweler’s hometown.

And it’s currently available for sale. While Tiffany declined to reveal the necklace’s sticker price, industry experts estimate that it would cost somewhere between $20 million and $30 million. It is the most expensive piece in the jeweler’s history after its famous 128.54 carat “Tiffany Diamond,” which is not for sale and has been labeled by Tiffany as “priceless.” While the Empire Diamond is for sale, Tiffany hopes that whoever purchases it will agree to lend the piece for special brand exhibitions.

Plans for the necklace were originally revealed by WWD in January. The design takes inspiration from the Tiffany necklace made for the 1939 World’s Fair, which was originally set with an aquamarine stone weighing in excess of 200 carats.

Looking to further evolve the World’s Fair Necklace’s design, Tiffany included an element of versatility. The Empire Diamond can be popped out and mounted onto a ring by carefully unscrewing a few small fasteners around the stone. Whoever purchases the design will be bestowed with a lifetime service — a Tiffany jeweler will remain on-call to convert the piece from a necklace to ring or vice versa.