This Sinu Tumbaga Gold Nose Ring, originating from the 3rd to 6th Century CE, is an exquisite example of pre-Columbian metallurgy. The XRF results show an intriguing composition of 40.5% gold (Au), 53.3% copper (Cu), 5.1% silver (Ag), and 0.7% germanium (Ge). Tumbaga, a gold-copper alloy, was commonly used in pre-Columbian America, prized for its unique coloration and ease of crafting. The higher copper content, unusual in comparison to European goldworks, imparts a distinctive reddish hue and signifies the cultural uniqueness of the piece. The addition of silver and germanium adds complexity and rarity to this artifact. With a gold content around 10 karats, this nose ring is a rare, culturally significant item reflecting the advanced metallurgical skills of the Sinu civilization.