The preserve is called "Occult Jam," it's part of an art show at London's Barbican Art Gallery.
"We thought about it and the most mundane food of all is jam. So we made it a surreal object," said Sam Bompas, founder of catering company Bompas and Parr.
The £5-a-jar of jam is both art and food and is made by infusing a tiny speck of the late Princess of Wales' hair with gin.
It is then mixed with milk and sugar to create a product with a taste a lot like condensed milk.
The chef said he decided to make the "Occult Jam" to encourage people to think about food marketing and how language enhances the everyday eating experience.
The hair was first bought on eBay for $10 from a US dealer who collects celebrity hair and sells it in extremely tiny parts.