Kellly Clarkson faces export bar
The star, who shot to fame when she won American Idol, bought the jewellery at auction last year for more than £150,000, but culture minister Ed Vaizey has put a temporary export bar on the work in a bid to keep it in the UK.
The ring is one of only three surviving pieces of jewellery known to have belonged to the Pride And Prejudice author, having been given to her sister Cassandra and then passed down through the family before it was sold.
Mr Vaizey said: "Jane Austen's modest lifestyle and her early death mean that objects associated with her of any kind are extremely rare, so I hope that a UK buyer comes forward so this simple but elegant ring can be saved for the nation."
The decision on the export licence will be deferred until September 30 and can be extended to December 30 if proof emerges of "a serious intention to raise funds" to match its six-figure price tag.
Austen, whose face will appear on £10 notes from 2017, wrote six full novels which cemented her place in the canon of English literature.
The books, which are regularly adapted for television and film, continue to sell well almost 200 years after her death at the age of 41, in 1817.
US singer Clarkson, who grew up in Texas, has sold more than 20 million records since winning the US talent show in 2002.