J.K. Rowling has helped design a "Harry Potter" charm bracelet that is expected to sell for quite a bit at Sotheby's auction house on Dec. 10, the Daily Mail reports, though it's for a good cause.

Featuring 12 "Potter"-themed charms, including Harry's infamous lightning bolt scar, broomstick and glasses, the bracelet named "Lumos Maximas" is predicted to go for around £20,000 ($32,714) at Sotheby's, all of the proceeds from which will go directly towards Rowling's children's charity, Lumos, which works to support more than 8 million kids who are systematically institutionalized across the globe, most of which are not orphans and are poor, disabled or from an ethnic minority.

The charm of a butterfly on Rowling's new bracelet, decorated with moonstones and amethysts, represents the logo of her Lumos charity, while a golden snitch, a Dark Mark skull with amethyst eyes, a Slytherin locket, a winged key, a "The Tales of Beedle the Bard" book, the sorting hat, the Deathly Hallows symbol and a wand which acts as the fastener are also featured on the piece.

The bracelet was made to mark the five year anniversary of "The Tales of Beedle and Bard," which was also auctioned off to raise money for Lumos, according to the Daily Mail, and is being sold as a part of Sotheby's English Literature, History, Children's Books and Illustrations sale.

While Rowling has written two adult novels in addition to the "Harry Potter" series, she has previously stated that she will "never top" her beloved franchise, which she has used as a platform to draw more attention to her international charity work.

"If you've had the kind of success that you never expected you can think 'oh no, how dreadful I'll never ever top that', or you can say 'how incredibly marvellous and liberating that I made money beyond my wildest dreams and that I can affect issues I really care about'," Rowling told Sky News last month.

"Drug-taking and suicide are more likely and a lot of these children may be trafficked or end up in the sex trade. To take a child from their family we know must be damaging, it's the worst thing you can do to a child.These themes are in the Harry Potter books. Voldemort was himself raised in an institution so, spookily, it was something I was very much thinking about. But we've started where the situation is particularly acute in Eastern Europe where there has been a cultural acceptance of institutionalization that thankfully in the UK we've really overcome."