A bright green glass spearhead believed to have been made by Aboriginal prisoners on Rottnest Island 100 years ago has been discovered by students during a university excursion.
Professor Len Collard from The University of Western Australia had taken the students to the island, known as Wadjemup, last week to learn about its Indigenous history as a prison for almost a century.
They were at one undisclosed site, believed to be on top of a hill, when one of the students uncovered a sparkling object.
Professor Collard said it was a rare glass spearhead that was at least 100 years old.
Story: Nicolas Perpitch, ABC News | Photo: University of WA