A piece of Mt Everest rock is expected to fetch up to $30,000 when it is auctioned in Auckland next week.
Portraits of Sir Edmund Hillary would also be up for grabs, believed to bring in a couple of thousand dollars between them.
The memorabilia was collected from the Everest Base Camp in May 2003, 50 years after Hillary and Sherpa Tenzing Norgay stepped onto the summit of the world's highest mountain.
The rock was mounted and the framed mounting has been signed by Hillary, his son Peter Hillary and Tashi Tenzing, the grandson of Tenzing Norgay.
The rock was one of three brought back to New Zealand after Peter Hillary was part of a mission to Base Camp where he hosted the 50th celebrations of the conquest of Everest.