The Wurundjeri & Gunung Willam Balug Tribes mined diorite at Mount William stone axe quarry which was a source of the highly valued greenstone hatchet heads, which were traded across a wide area as far as New South Wales and Adelaide. The mine provided a complex network of trading for economic and social exchange among the different Aboriginal nations in Victoria. The quarry had been in use for more than 1,500 years and covered 18 hectares including underground pits of several metres. In February 2008 the site was placed on the Australian National Heritage List for its cultural importance and archeological value.