I checked online for UP owner ~ ~ ~ As for the method of inquiry, I should go to official website, and the issuing authority should check it ~ ~ Before I went to a Chaohongji to buy loose diamonds, the other party said ~ ~ ╮ (╯ ▽ ╰) ╭ But some people were too lazy to check it themselves ~ ~ Diamond picture: located in the front and center of the diamond appraisal certificate. Steel seal: the diamond appraisal certificate must have a clear steel seal, with the words appraisal unit and the anti-counterfeiting mark of the appraisal unit on the steel seal. Date: The date on the certificate refers to the valuation date of the diamond. Shape &; Cutting): refers to the cutting and grinding shape of diamonds. Generally, round diamonds are more common, including squares and diamonds. Size: This item records the maximum diameter of the diamond and the size of the main part of the whole body in millimeters ... Weight: On the certificate, the weight unit of the diamond is carats, accurate to the third decimal place. Also marked as the total weight, the unit is generally gram (g). Color grade: According to GIA's color grade table, the color grade of diamonds is divided into 23 grades, from completely colorless D to yellowish brown Z. Among them, D.E.F belongs to the colorless range, G.H.I.J belongs to the near colorless range, K.L.M is light yellow, and below N is light yellow. The name below Z is colored diamond, which is very expensive.

Clarity grade: the classification of diamond clarity grade is the sum of the internal and external characteristics of diamonds detected by skilled appraisers under a magnifying glass of ten times. Factors such as the size, number, location, characteristics, color or visibility of features determine the level of clarity. It is divided into five levels: FL (flawless), VVS (minimal flaw), VS (minimal flaw), SI (minor flaw) and I (big flower). & lt/FONT & gt；