Diamonds are the hardest of all natural substances, and diamonds can inscribe any other gemstone, but no other gemstone can inscribe a diamond. It can also be scored with a "standard hardness tester". Any hardness less than 9 degrees is a fake diamond. Diamonds are also lipophilic, such as drawing a line on the surface of the diamond with a pen, it becomes a continuous straight line, while other gemstones show intermittent intermittent lines. The above methods have certain reference value in the identification of diamonds. It can also be observed through a 10x magnifying glass. Under a 10x magnifying glass, most diamonds can be seen with flaws and triangular growth patterns. The surface of the diamond has "fire" light of "red, orange, blue" and other colors. shining. The most accurate and reliable method is to use a "thermal conductivity meter" to measure the thermal conductivity data to distinguish real and fake diamonds, but the "thermal conductivity meter" is more expensive.

There are four main dimensions to measure the quality of a diamond's rarity, namely weight, clarity, color and cut, which are commonly referred to as the "4Cs".

A measure of a diamond's beauty attributes is called beauty. The beauty of a diamond depends on the effects of light. The light effect of a diamond is identified by three indicators, brilliance (white light), fire (colored light) and scintillation (scintillation). The higher a diamond's brilliance, fire, and sparkle are rated, the more beautiful and radiant the diamond is.

Diamonds are identified by an internationally recognized gemologist and issue an independent third-party opinion, based on the 4Cs, which in turn determine the diamond price.

Diamond 4C grading is to use the advantages of AI and machine vision technology to overcome the shortcomings of manual grading through automatic detection instruments, and to provide objective and accurate 4C grading results. Diamond light performance/brilliance is a measure of how well a diamond responds to light

There are four measures of diamond light performance: brilliance, brilliance, fire, and light symmetry. The higher the light performance rating of a diamond, the brighter the diamond. Practice has shown that a high 4C rating does not necessarily mean that a diamond has a higher optical performance level. In practical applications, the diamond optical performance standard is often used as a supplement to the 4C standard to ensure the accuracy of diamond grading and pricing.

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