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Anything will scratch or corrosive to diamond?


E & E
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No to the acid part. Diamonds are inert. 

For the other, it depends on your definition of scratch.  Diamonds can be damaged by lots of things, and that damage can be a series of chips that look and act sort of like a scratch.  In the usual 'harness test' thing, no.  I suppose I should add that there are some laboratory created nanomaterials like boron nitrate that are technically harder than diamonds. 

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Bear in mind that you can get a softer material to scratch a harder one... the wear rate will be much higher on the soft material, but you can scratch (or more correctly chip) a diamond using steel.

Also, high temperatures can affect the appearance, but that's generally minor and can be addressed by repolishing, unless it is causing the stone to shatter or burning it off completely (>~800 °C) .

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On 2018年12月4日 at 6:43 AM, LaurentGeorge said:

It's highly unlikely unless you rub the diamond with the sand vigorously for quite a while and still the damage to the diamond would be insignificant.  The metal of the ring on the other hand will not be very happy. 😉

 

Thanks for clearing my concern for the stone~And yes the metal will definitely not be happy, but the good side is we can largely convert it to its original luster by polishing.

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1 hour ago, E & E said:

 \.\Thanks for clearing my concern for the stone~And yes the metal will definitely not be happy, but the good side is we can largely convert it to its original luster by polishing.

Be careful - polishing is more abrasion, and bezels or prongs holding the stone may become unsafe.

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3 minutes ago, davidelevi said:

Be careful - polishing is more abrasion, and bezels or prongs holding the stone may become unsafe.

Is it because polishing actually makes the metal thinner? I thought it would be a very tiny amount. Pls correct me if I am wrong, thanks~

And how about platinum, I learnt that when it is scratch and polished, nearly no metal is polished away in fact?

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Yes. If the metal is severely abraded to start with (to the point that a diamond set into it is scratched), repolishing  may require removal of quite a bit of metal; prongs and bezels are typically quite thin to start with.

Platinum will furrow and dislocate in many conditions (rather than scratch and chip away like gold), but it can get gouged away too; rubbing a ring on sand isn't exactly normal usage...

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Polishing requires the removal of a layer of metal.  The deeper the scratches, the thicker the layer that has to be removed.  With most jewelry, occasional re-polishing (every few years) is not a major problem, but with the advent of micro pavé and settings with tons of small mêlées, you have to remember that the prongs holding these stones are extremely small and it does not take much to compromise them.  It is fairly common for pavé rings to loose stones after a vigorous re-polishing.  Just something to bear in mind.  We are shooting in the dark as you have not told us what the exact situation is nor what the ring actually looks like, if you are speaking in more than just hypotheticals.

 

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21 minutes ago, davidelevi said:

Yes. If the metal is severely abraded to start with (to the point that a diamond set into it is scratched), repolishing  may require removal of quite a bit of metal; prongs and bezels are typically quite thin to start with.

Platinum will furrow and dislocate in many conditions (rather than scratch and chip away like gold), but it can get gouged away too; rubbing a ring on sand isn't exactly normal usage...

Thank you so much for the detailed reply and consideration~Especially alerting me to the potential risk. 

Dont worry, just come back with my wife from our anniversary trip in Maldives and had only a few touches with the sand. Being interested in learning more about taking care diamond and Jewel pieces, thus created this thread.

You know it's interesting that I am more sensitive than my wife on this topic~

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