Tungsten is crucial for various applications, from electronics to defence. Credit: Bjoern Wylezich/Shutterstock.com. Masan High-Tech Materials has announced plans to expand its Nui Phao mine and Nui Chiem site in Vietnam, potentially introducing 115 million tonnes of tungsten-polymetallic resources, Bloomberg reported. This move aims to attract foreign investment and strengthen the company’s presence in the global critical minerals sector.