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How to Identify Platinum and Silver Jewelry by Emily
The color of platinum and silver jewelry are very similar so that the people who have not enough knowledge on them will be easy to dazzle and difficult to identify them. Therefore, maybe somebody will make a bad bargain for themselves. In order to lose less, it had better for us to learn more knowledge on how to identify platinum and silver jewelry.
Silver is a kind of metal which is next to gold. The qualities of bright color and ductility make it become the main material for silver jewelry or some other silver products. Silverâs melting point is 960.5 ┑ and it can be made of the 0.0015 silver foil or 1 gram of pure silver can stretch into more than 1000 meters silver line.
Platinum is a brilliant and precious metal. The color of this kind metal is natural silver, and never fade is its big feature.
1, Identify them through the mark
If the jewelry show the marks of âPTâ âPLATINONâ âPLATâ, they are platinum. On the contrary, the jewelry are marked with âSâ or âSILVERâ that mean they are the silver. And the âS925â represents the jewelry which include 92.5 percent pure silver, and if marks âSFâ that means this kind of jewelry contains 7.5 percent copper metal. Of cause, this kind of silver jewelry â 925 silver jewelry is actually the most popular jewelry among silver accessories.
2, Identify them through the weight
Platinum proportion is 21.40 and silver is 10.49. The silverâs weight is almost lighter double than platinum when they are at the same volume. So generally people could identify through weight.
3, Compare with the hardness of their appearance
Carefully observed the platinum with our naked eyes, we could find that platinum is bright white but with slightly grey, hard texture and will have no scratches if pricked. Its Mohs hardness is 4.3. While silver is great white and smooth texture, it will change into grayish-white or black after oxidation which could wipe out. Its Mohs is 2.7 that softer than platinum.
4, Identify them through burn method
Platinum has a good resistance of high temperature oxidation. Its melting point reaches as high as 1770 ┑ and the color will not change by burn with high temperature and cooled, but silver has a lower melting point so that it will change to red, black or corvinus which depend on the amount of silver.
5, Identify them through chemical method
Silver has no excellent resistance to corrosive, while platinum has stronger stable, corrosion-resistant chemical properties and there will no any reacts when platinum meets any acids or alkalis.
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Article Source: http://www.earticlesonline.com/Article/How-to-Identify-Platinum-and-Silver-Jewelry/857781
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