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<p>[QUOTE="IvaPan, post: 9511387, member: 78949"]Rachel, unfortunately I don't know anything about testing, just went a couple of times to a local jeweller and watched him testing and commenting. He rightly guessed the pieces I brought him before testing but still did the testing and it confirmed his guess so I assume he knows his job and therefore trust him. One of the chains was plated gold (or washed??) and he warned me that testing would probably peel some of the coating but I needed to know so I allowed it. It indeed peeled the gold coating on the spot of rubbing but it is visible only under magnification. </p><p><br /></p><p>Judging by this experience I guess that if it is plated, it should look different on the spot of rubbing under big magnification. So if you look at this spot under a loupe, you may be able to see if some coating is missing and another substance is visible under it. </p><p><br /></p><p>Just a thought, maybe totally irrelevant as there are different types of gold or silver plating with different thickness, and maybe not all of them will behave in this way when rubbed for testing.[/QUOTE]</p><p><br /></p>
[QUOTE="IvaPan, post: 9511387, member: 78949"]Rachel, unfortunately I don't know anything about testing, just went a couple of times to a local jeweller and watched him testing and commenting. He rightly guessed the pieces I brought him before testing but still did the testing and it confirmed his guess so I assume he knows his job and therefore trust him. One of the chains was plated gold (or washed??) and he warned me that testing would probably peel some of the coating but I needed to know so I allowed it. It indeed peeled the gold coating on the spot of rubbing but it is visible only under magnification. Judging by this experience I guess that if it is plated, it should look different on the spot of rubbing under big magnification. So if you look at this spot under a loupe, you may be able to see if some coating is missing and another substance is visible under it. Just a thought, maybe totally irrelevant as there are different types of gold or silver plating with different thickness, and maybe not all of them will behave in this way when rubbed for testing.[/QUOTE]
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