1. From the perspective of material composition, K gold is an alloy metal formed by fusing gold with other metals, and its gold content is usually low, such as 14K or 18K, which indicates the percentage of pure gold content. The pure gold refers to gold with a gold content of not less than 99%, including thousands of pure gold and thousands of pure gold. The former has a gold content of 99.9%, while the latter is more pure, with a gold content of 99.99%.

2. In terms of hardness and durability, K-gold contains other metals, such as copper and silver, which have higher hardness than gold, so K-gold has a relatively high hardness, and it is not easy to be worn and deformed, so it is suitable for daily wear. However, pure gold is more vulnerable to damage and scratches because of its high purity and relatively soft texture.

3. From the color point of view, K gold can show different colors according to the types and proportions of other metals mixed, such as platinum and rose gold, which provides consumers with more choices. The color of pure gold mainly presents a full golden color.

4. Considering the price, the price of K gold is cheaper than that of pure gold, because the gold content of K gold is low and the cost is relatively low. Because of its high purity, the price of pure gold is naturally higher.