The purest gold has a measure of 24 carats.A fineness of 100% is impossible to achieve as there will be some degree of impurity in commercially available gold
High Karat Gold: The Complete Guide to Understanding Gold Quality
Gold Purity Guide
How to Check Gold Purity
Gold Purity Measurement & How to Test Gold Purity
Capone's Jewelry - HOW GOLD PURITY IS MEASURED The purity of gold is measured using the karat system. This system has been developed to measure the ratio of pure gold to other
Gold Purity Guide
GOLD - アクセサリー
GOLD - アクセサリー
Introduction to All Gold Karats: 9k, 10k, 14k, 18k, 22k, and 24k
GOLD - アクセサリー
Understanding the different measures of purity of gold
Dupion Fine Jewellery - This illustration outlines the purity of gold measured using the Karat (K) system, which is a measurement indicating the proportion of gold in an alloy out of 24
Gold Purity 101: Your Ultimate Guide to Understanding Gold's Quality