International Gold Yellow Code
The International Gold Yellow Code (IGYC) is a color coding system used to identify the purity of gold. It was developed by the World Gold Council in 1964 and is now the international standard for gold purity.
The IGYC uses a series of colors to indicate the percentage of pure gold in an alloy. The colors range from deep orange to yellow, with the darkest shades indicating the highest purity. The IGYC code for each color is a two-digit number, with the first digit indicating the purity and the second digit indicating the alloy.
The IGYC is used to label gold jewelry, coins, and other objects. It is also used by gold refiners to determine the purity of gold before it is sold.
The IGYC is a valuable tool for ensuring the authenticity and purity of gold products. It helps consumers to make informed purchasing decisions and protects them from fraud.
The IGYC color chart
| Color | Code | Purity |
|—|—|—|
| Deep orange | 10 | 99.99% |
| Orange | 12 | 99.9% |
| Yellow | 14 | 99.5% |
| Light yellow | 18 | 98.5% |
| Pale yellow | 22 | 97.5% |
| White | 99 | 92.5% |
How to use the IGYC
To use the IGYC, simply look for the code on the item you are interested in. The first digit of the code will indicate the purity of the gold, and the second digit will indicate the alloy.
For example, an item with the IGYC code 14 is made of 99.5% pure gold and 0.5% alloy. An item with the IGYC code 22 is made of 97.5% pure gold and 2.5% alloy.
The IGYC is a simple and easy-to-use system for determining the purity of gold. It is an important tool for consumers and goldsmiths alike.
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