925 gold is 92.5% pure gold. The purity of gold refers to the content of gold. Generally, K is used to indicate the purity of gold. 24K gold has the highest purity, followed by 18K and so on. The name of gold depends on its purity.

The name of gold depends on its purity. For example, 99% pure gold is called pure gold, 99.9% pure gold is called thousand pure gold, 99.99% pure gold is called ten thousand pure gold, and 99.999% pure gold can be called one hundred thousand pure gold or high pure gold.

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The higher the purity of gold jewelry, the darker the color. In the absence of a gold medal, the general fineness can be determined according to the following colors.

The fineness of deep red yellow is above 95%, light red yellow is 90-95%, light yellow is 80-85%, blue yellow is 65-70%, blue white is only 50-60%, and yellow white is less than 50%.