The color of the diamond itself is light yellow. This is exactly the grading of diamond fineness according to the degree of insufficient fineness. The lighter the color of the diamond, the higher the fineness grade. After cutting, color is usually considered as the second important feature in selecting diamonds. This is because human eyes tend to perceive the brightness (refraction) of diamonds first, and then the color.
The colors of diamonds are divided into two series. Common colorless series include colorless transparent, nearly colorless and light yellow. There are also color series including dark yellow, gray, pink diamond, black and so on. The color classification of diamonds is based on the color classification established by GIA, American Gemological Institute, from "D" (transparent and colorless, that is, starting from the initial letter of diamonds) to "Z" (yellow). Colored diamond is a kind of rare and extremely expensive diamond. The color grading system is not suitable for colored diamonds.
Extended data
Diamonds are commonly known as "Jin Gangzuan". That is, we often say that the original diamond is a mineral composed of carbon, which is an allotrope of carbon. Diamonds are the hardest substance in nature. Diamonds are widely used, such as handicrafts and industrial cutting tools. Graphite can form synthetic diamond at high temperature and high pressure. It is also a precious stone.
20 18, 18 In February, a yellow diamond weighing 552 carats was unearthed in Canada, becoming the largest diamond found in North America? .