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.PT900, PT950 and PT990 are labels of platinum, representing 90%, 95% and 99% of platinum content respectively? Jewelry.
3.PD900 and PD950 represent 90% and 95% palladium respectively, and PD is also the cheapest of the three kinds of gold. Palladium has just come out and is favored by people, but its shortcomings are outstanding, and it will turn gray if it is left in the air for a long time.
Note: The above marks usually represent the characteristics of the ring material metal. 18K gold belongs to gold and is an alloy of gold and other metals. 24K is the real pure gold, and 18K gold is suitable for jewelry.
Therefore, the names of 18K platinum and 18K pure gold on the market at present are all wrong. According to the national regulations, only platinum can be called platinum, 18K platinum can only be expressed in a popular way, and written expression can only be called 18K platinum. The title of 18K platinum will be misunderstood as impure platinum.
Palladium is a member of the platinum group, and isomorphic substitution widely exists in platinum group precious metals, palladium and platinum. Palladium and platinum have similar appearance and hardness, silvery white, metallic luster and stable chemical properties.
Platinum and palladium are the two minerals with the smallest reserves in the platinum group, and they are also very rare. But it is strictly different from platinum: first, the palladium component is sealed as "PD"; Second, the price of palladium is nearly half that of platinum; Third, the specific gravity of palladium is lighter than that of platinum, and it will turn gray if left in the air for a long time.
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.
Extended data:
Identification method of ring-supporting materials of diamond ring 1: sensory inspection of wedding ring quality.
Look at the color: pure gold is dark yellow, k gold is yellow, red, white and other colors, while imitation gold products are mostly copper alloys with lighter colors. Weight: The specific gravity of gold is 19.3g/cm3, which is much higher than that of imitation gold products. For example, a gold ring is about 5g, while imitation gold products of the same size generally weigh less than 3g.
Identification method 2 of the ring support material of diamond ring: check the mark.
According to the national standard, precious metal ornaments should be marked with the origin, manufacturer, material and content, and products without marks are unqualified products. If there is a quality problem, the quality inspection agency can give detection and judgment according to the imprint. Consumers should buy their own brands and gold ornaments with different gold contents according to the imprint.
Identification method of diamond ring supporting ring material 3: professional organization identification.
If you need to know the content of precious metal jewelry accurately or have quality disputes, you should go to the jewelry quality inspection agency and identify it through physical or chemical analysis. When buying jewelry, you need to carefully check whether the gemstone is firmly inlaid and welded, and whether there are any fractures, burrs, trachoma, etc.
Identification method 4: the difference between platinum 950 and platinum 900.
Platinum is called PT for short, and everyone basically knows PT950. Generally, platinum rings are made of this material, which means jewelry with 95% platinum and the remaining 5% other precious metals, bearing the imprint of Pt950.
T900 is an ornament containing 90% platinum, and the remaining 10% is other precious metals with the imprint of Pt900. PT900 is hard and suitable for setting diamonds, while PT950 is pure and soft, with higher purity and more value preservation. Most platinum ring holders are made of Pt900, but a few manufacturers use Pt950 to make ring holders.
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