London, England -- A lock of Mick Jagger's hair is scheduled to be auctioned July 3.
Jagger's hair is estimated at $2,300 to $3,100, according Bonhams, an auction house in London.
A statement on Bonhams' website says Chrissie Shrimpton's grandmother obtained the lock of hair while Jagger and Shrimpton were staying at her parents' farm in the 1960s.
Shrimpton's grandmother passed the lock onto another relative when she died, but it was later returned to Shrimpton by one of her cousins.
The website says all money from the sale will be donated to Changing Faces.