Earlier, people depended on touchstone tests or the local jeweller’s word. Those methods were quick but not always accurate.

Arizona State University scientists have unveiled NasRED, a revolutionary one-drop blood test that can detect diseases like COVID-19, Ebola, HIV, and Lyme with incredible speed and precision. Using ...

Bullion dealers and pawn shop owners require appropriate tools to ensure they are providing their customers with pure gold, silver, and other precious metals. Several analytical methods are used to ...