‎ماجد عبد الحميد‎ on Instagram: "In this video, I explain the most reliable methods used to verify gold and determine its purity, from traditional field tests to advanced laboratory techniques. You will learn the difference between visual inspection, chemical testing, and non-destructive XRF analysis, and why cupellation is still considered the most accurate reference method for determining gold fineness. This content is designed for gold traders, jewelers, investors, and anyone who wants to und