The certificate is only responsible for the sample, and the product code is an internal identification, which is abnormal.
Generally, precious metal jewelry is marked with material, gold content, template number and ring diameter.
There is no distinction between "thousands of gold" and "thousands of gold" in the naming of national precious metals, and they are generally identified by au999 or 24k.
It is recommended to ask for an invoice and see the name of the invoice.
In the last week, gold has been falling again and again, and the price has been lower than that of 20 13 aunt when she robbed gold.
201165438+1October 14, the transaction price is about 228.7 yuan, the gold jewelry is about 265 yuan, the gold investment is 235 yuan, and the pawnshop's recovery price is only below 195 yuan. Therefore, you should be cautious when investing in risky business. For detailed brand prices. First, what jewelry will be printed?
Not every kind of jewelry will be printed. Take the simplest example: jade must not be printed, because the material of jade is special. After carving and polishing, it is not convenient to type another layer of words on it, and it is not necessary-so as long as it is not inlaid with jewels and jade, there is no need to print signboards.
Generally speaking, only gold and silver jewelry will be engraved, which is equivalent to the role of certificate, as well as inlaid jewelry and jade. For example, a piece of jade has a metal seal on it, and there will be lettering under the back cover. So what words are engraved on these jewels?
Second, what is the carving on the jewelry?
1, manufacturer code, brand name
We won't talk about homemade jewelry without a brand, but as long as it is a well-known jeweler, it will engrave its own brand logo or abbreviation on its jewelry.
2. Letters represent species and numbers represent purity.
① Gold/gram: gold
Gold has two abbreviations, one is gold element Au in chemistry, and the other is G (meaning gold). There will be numbers after them, such as G750 and Au999. Gold jewelry is divided into pure gold and k gold, which will be introduced in detail below.
②S: silver
Everyone must be familiar with silver. This means silver.
As long as people who have bought silver jewelry are familiar with "S925", most silver jewelry on the market will be engraved with these words, which means it contains 92.5% pure silver.
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③ platinum: platinum
Pt is usually followed by numbers, such as Pt900, Pt950 and Pt990, which all mean metal content.
For example, Pt950 represents 95% pure platinum.
④ Palladium: palladium (b) gold.
Ever heard of this name? Palladium is a member of platinum, which looks like platinum and has a silvery metallic luster, but its density is smaller than platinum and its ductility is strong.
⑤GP/KP: Gold plating.
Gold plating is actually worthless, so there is a gap with it, not precious metal jewelry.
Gold plating is to coat a thin layer of gold on the surface of jewelry made of silver or copper by electrolysis principle, marked GP or KP. In China, there are also standards for the thickness of gold plating: the thickness of gold plating layer is not less than 0.5um (unit: micron, equal to 0.00 1 mm).
⑥KF: Jinbao
Gold plating is somewhat similar to gold plating, that is, a layer of gold foil is attached to the jewelry desktop bag to make the jewelry look similar to real gold jewelry, shiny and not easy to fade.
However, the gold-plated jewelry is not durable, and the gold foil will be uneven, peeling and even falling off.
Gold, platinum, palladium and silver are all common precious metal jewelry in the market, while gold-plated and gold-plated jewelry are imitation jewelry with low cost.