How to tell if a platinum necklace is genuine

Look at the color gloss, or weigh it, and then calculate the density according to its volume, you can see if it is platinum.

Platinum: Platinum (PT), chemically more stable than **, and more expensive than **, is used to make high-end jewelry. The words "PT900" or "PT950" on the products in the jewelry store indicate that the platinum content in the jewelry is 90 and 95 respectively.

The general purity of pure platinum jewelry is 95, while the purity of 18k gold is only 75. No metal can be completely pure, there are impurities, doped with other metals. Platinum has almost no impurities and is extremely pure, so it will not fade or change color, and will remain lustrous over time.

The pure white luster of platinum reflects the true brilliance of the diamond. Rare Platinum is 35 times rarer than ** and can only be mined in very few places around the world, mainly in South Africa and Russia, as well as a few parts of Zimbabwe, Canada, South America. Every year, only 88 tonnes of platinum are made into ornaments, compared to 2,700 tonnes.

The number of platinum ores is less, with a ratio of 1 to 10 mines. The density and weight of eternal platinum make it more durable than other jewelry metals. All precious metals leave scratches, and platinum is no exception.

However, a scratch on platinum only moves the metal and does not reduce its volume, while a scratch on the platinum brings wear and tear, reducing the volume of the platinum. If there are indeed visible scratches on the platinum, a qualified jeweler can re-polish it.

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Method. 1. Look at the signs.

According to the relevant national requirements, all jewelry must be engraved with the corresponding material mark. The symbol of platinum is PT, and the common signs are PT950 and PT900, which is the purity of platinum, that is, thousandths of platinum content. This logo is like a platinum ID card, and only jewelry with the platinum logo printed on it is real platinum.

Method. Second, look at the color, whether it is oxidized.

Pure platinum is tin-white in color with a brilliant luster. The chemical properties of its platinum are very stable, will not fade, and will not oxidize and turn black because of long-term non-wearing.

Method. Third, weigh the weight.

Platinum weighs more than white gold and silver, so when the size of the jewelry is the same, the heavy one is generally platinum jewelry.

The authenticity of platinum can be distinguished from the color, specific gravity, logo, fire and other aspects.

The simplest identification looks at the metal mark, the regular platinum jewelry will be engraved with the word "pt" in accordance with the provisions of the country, the content of platinum in different jewelry is also different, all will have full platinum, 950 platinum, 900 platinum, 850 platinum distinction, if there is no these words, you don't need to look, it is definitely not platinum.

**And platinum many people will be confused, first of all, you should know, ** color is white, and pure platinum is tin-white, is the kind of white with a little gray, the color is very bright, white gold is beige, so when you buy platinum, the second step is to distinguish from the color.

Other ways to identify authenticity

Point test method, this method is a little complicated, you can buy the power from the corners of the jewelry grinding some powder, put into hydrogen peroxide, because real platinum can be used as a catalyst to make hydrogen peroxide decompose, thereby releasing oxygen, you can observe whether there are small blisters, if there is, it is real platinum, if not, you should pay attention. It is important to know that the melting point of platinum can be as high as 1773, so it is impossible for ordinary welding torches to melt platinum directly, but this method is difficult to implement.

Platinum jewellery can be placed next to an open gas stove and left for a few minutes, if the jewellery turns red and heats up and ignites the gas, it proves to be a genuine platinum product. If you don't want to damage the jewelry itself or you are still not sure how to identify it, it is recommended to take the platinum you purchased to a specialized jewelry store for identification.

Summary. Pure platinum, after the fire is struck, it makes the sound of "Toto", there is no rhyme, and the impure color makes a "ding" sharper sound, with sound and rhyme.

How to distinguish the real from the fake in platinum.

1. Look at the color.

According to the level of color, it is generally divided into three colors, blue and white microgray is the natural color, and the natural color is higher; The blue-white yellowish color is in white gold, containing ** or copper components, and the color is inferior; **Color is platinum contains more ** ingredients, and the fineness is lower than the above.

2. Listen to the rhyme.

Pure platinum, after the fire is struck, it makes the sound of "Toto", there is no rhyme, and the impure color makes a "ding" sharper sound, with sound and rhyme.