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. Silver's 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.
Identify them through the mark
If the jewelry show the marks of PT PLATINON PLAT, they are platinum. On the
contrary, the jewelry are marked with S or SILVER that mean they are the
silver. And the S925 represents the jewelry which include 92.5 percent pure
silver, and if marks "SF" that means this kind of jewelry contains 7.5
percent copper metal. Of cause, this kind of silver jewelry-925 silver
jewelry is actually the most popular jewelry among silver accessories.
Identify them through the weight
Platinum proportion is 21.40 and silver is 10.49. The silver's weight is
almost lighter double than platinum when they are at the same volume. So
generally people could identify through weight.
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.
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.
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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