Brad Pitt has been photographed wearing a diamond pendant necklace his partner, Angelina Jolie, had specially designed for him.

The diamond necklace – reportedly worth six figures – is the work of jewelry designer Robert Procop and features a "secret" love message from Jolie to Pitt.

Procop told the UK's Daily Mail tabloid that he can't reveal what the message says, "and you'd need a microscope to read it."

"The technology is quite new. The hidden message is lasered on," Procop noted.





This is not the first collaboration between Jolie and Procop. Last year, she and Pitt worked with the designer on a gold and silver jewelry collection to benefit their charity, the Education Partnership for Children of Conflict.

Jolie is also planning to work with Procop on a line called The Style of Jolie, all proceeds from which will go to the same charity.