Knowing Diamonds Starts with 4C

2021-03-05 12:09:39

What is 4C?

That is Carat (carat), Color (color), Clarity (clarity) and Cut (cut). Knowing the market-recognized evaluation criteria helps to select the ideal diamond.

Carat (Carat)

It is the unit of weight of diamonds. More than 3,000 years ago, people discovered the first diamond in India. There is a saying about the unit of measurement of diamonds: There is a carob tree in India, and the beans on the tree weigh 0.2 grams each. People use the weight of a bean as the standard unit of diamond weight-carat. People divide 1 carat into 100 points. The larger the diamond, the rarer it is, and the higher its value.


There are many different colors of diamonds. For white diamonds, colorless diamonds are the best. The color grading system for white diamonds is established by the Gemological Institute of America (GIA). The lighter the color of the diamond, the higher the value. The highest grade is D (colorless), and the lowest is Z (yellowing).

lab gorwn diamond price


GIA diamond clarity standards are divided into 6 types and 11 grades.

Flawless (FL):

Observed under a 10x magnifying glass, the diamond has no inclusions or surface features.

Internally Flawless (IF):

Observed under a 10x magnifying glass, there is no inclusion in the diamond.

Very slight inclusion level (VVS1 and VVS2):

Observed under a 10x magnifying glass, there are extremely fine inclusions inside the diamond, which are difficult to see even by a professional appraiser.

Slightly included (VS1 and VS2):

Observed under a 10x magnifying glass, the diamond’s inclusions are clearly visible, but very small.

Micro-inclusion level (SI1 and SI2):

Observed under a 10x magnifying glass, the diamond has visible inclusions.


The most perfect diamond must have 3 Excellent lathes. Diamond lathes are a very important part of 4C. The more refined, the more brilliant the diamond can be created. Diamond turning is the cutting of diamond faces. Regardless of the shape of the diamond, as long as it is a beautifully cut diamond, it is a masterpiece of the diamond cutter’s ingenuity. Because a perfectly cut diamond is cut too deep or too shallow, the light will be lost from different positions and the brightness will be impaired. It can condense more light, reflect more light, and give the diamond higher value. Don’t worry about whether you can judge the quality of the diamond carpenter. When buying diamonds, you can compare the light refraction. Huanghe Whirlwind is a professional lab grown diamond manufacturer in China, and we offer all kinds of lab grown diamond for sale. Contact us for free quotation today!


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