Brightstar Resources (ASX:BTR) said the Western Australia-based Sandstone gold project prefeasibility study was advancing, with GR Engineering Services (ASX:GNG) being engaged for processing infrastructure design and Independent Metallurgical Operations for metallurgical test work, according to a Tuesday Australian bourse filing.
A mineral resource upgrade for Sandstone is targeted for release in the first half of 2026. Brightstar and Aurumin (ASX:AUN) currently have six drilling rigs operating in the project.
Brightstar's shares fell over 2% in recent trading on Tuesday.