The unit weight of diamonds is higher than that of Huang Jingui. Compared with gold, high-quality big diamonds are even rarer in nature. The formation of diamonds requires extremely special geological conditions and takes millions of years to form. Although gold is also a rare resource, it is widely distributed. The process of diamond mining and processing is complicated, involving many links, including mining, cutting and polishing. In addition, only a few countries in the world have large-scale diamond production capacity. Therefore, the supply of high-quality big diamonds is relatively small. As one of the main gems in the jewelry industry, diamonds are widely recognized and sought after in the global market. Whether as jewelry or investment products, people generally have a high awareness of the demand and value of diamonds. This market demand has pushed up the price of diamonds. So the unit weight of diamonds is higher than that of Huang Jingui.