Generally speaking, diamond rings usually have these labels: G 18K, Au 750, G750, PT 900, PT 950, PD 900, PD 950, etc., which represent the material and material content on the diamond ring.

1, G 18K, AU750 and G750 represent 18K, and the gold content is 75%, which is relatively the most suitable material for setting diamonds.

2.Pt 900, Pt 950 and Pt 990 are labels of platinum, representing ornaments with platinum content of 90%, 95% and 99%.

3.PD900 and PD950 represent 90% and 95% palladium respectively, and PD is also the cheapest of the three kinds of gold.

Others start with d, followed by some numbers. D stands for diamond and is the first letter of the English word "diamond". For example, D050 refers to a diamond of 50 cents (0.5CT). D 13 1 d0075 refers to the main stone 1.3 1 carat, and the auxiliary stone is 7.5 points (0.0075 carat).

In addition to the above common symbols, diamond rings have some other symbols, some of which are company abbreviations, places of origin, manufacturers, brand labels and so on. Some will also mark the diamond cut, clarity, color grade, etc.