k金为什么比黄金贵？

黄金和K金都是贵金属，但K金的价格通常比黄金贵。这是因为它们之间存在一些区别和特性。

首先，K金的成色（即纯度）比黄金低。黄金的纯度通常为99.9%，而K金的纯度一般在75%左右。因此，K金中添加了其他金属，使其强度和硬度更高，更适合制作珠宝和饰品。虽然K金的成色较低，但其金属性能却得到了提升，这也是K金比黄金贵的原因之一。英文翻译：

Why is K gold more expensive than gold?

Both gold and K gold are precious metals, but K gold is usually more expensive than gold. This is because there are some differences and characteristics between them.

Firstly, the purity of K gold is lower than that of gold. The purity of gold is usually around 99.9%, while the purity of K gold is generally around 75%. Therefore, other metals are added to K gold to increase its strength and hardness, making it more suitable for jewelry and accessories. Although the purity of K gold is lower, its metal properties are improved, which is one of the reasons why K gold is more expensive than gold.