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Surface etching of diamonds
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=7&t=15316
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Author:  naitik [ Thu Jan 26, 2012 4:12 am ]
Post subject:  Surface etching of diamonds

Hello
someone from industry shown me diamond surface etching rough diamond...specially done on thin paper coated low value diamonds...I really don't understand this treatment.Does anyone have knowledge regarding this?

Regards
Naitik

Author:  Barbra Voltaire, FGG [ Fri Jan 27, 2012 2:16 am ]
Post subject:  Re: Surface etching of diamonds

I'm sorry naitik, but I don't understand your question.

Author:  naitik [ Fri Jan 27, 2012 3:10 pm ]
Post subject:  Re: Surface etching of diamonds

Dear Barbara
see this photographs and comment on this

Attachments:
polishafter.jpg
polishafter.jpg [ 13.47 KiB | Viewed 2897 times ]
polishbefore.jpg
polishbefore.jpg [ 17.38 KiB | Viewed 2897 times ]

Author:  Barbra Voltaire, FGG [ Sat Jan 28, 2012 12:17 am ]
Post subject:  Re: Surface etching of diamonds

So, what is your question?

Author:  cascaillou [ Sat Jan 28, 2012 12:18 pm ]
Post subject:  Re: Surface etching of diamonds

If I got you right, you say that people are polishing the surface of rough diamonds. How is that confusing to you?

Mineral collectors usually do not want crystals facets to be denatured by polishing (which is making facets more shiny and transparent, but also erases natural features which are interesting evidences of the mineral growth history), although polishing of the facets can be tolerated when it is necessary to reveal interesting inclusions which wouldn't be visible otherwise. But unless one wants to buy rough diamond crystals for a mineralogical collection, there's no reason not to want them to be surface polished as this indeed better reveals their internal qualities.

Author:  naitik_mehta [ Tue Jan 31, 2012 2:50 am ]
Post subject:  Re: Surface etching of diamonds

Well my question is how people can achieve this result? its something looks like diamond pearl beeds. and main question is why ? what is the benefit to do this process? I want to mention here that, it is done on natural industrial diamonds, not to any man made diamonds.

Author:  Conny Forsberg [ Tue Jan 31, 2012 8:42 am ]
Post subject:  Re: Surface etching of diamonds

If you tumble diamonds in large quantities together they will reach that state. How long time? No idea...

Author:  naitik_mehta [ Tue Jan 31, 2012 1:55 pm ]
Post subject:  Re: Surface etching of diamonds

hello conny
thanks for ur inputs. but i dint get meaning of tumbling diamonds? is it something like deep cleaning in acids?please give me more details or links to understand it. thanks

Regards
Naitik

Author:  Barbra Voltaire, FGG [ Tue Jan 31, 2012 3:20 pm ]
Post subject:  Re: Surface etching of diamonds

See this link on tumble polishing gems
http://www.diamondpacific.com/tumblepolis.html

It does not involve cleaning with acids.

Sidebar naitik_mehta: Please try to use proper punctuation, complete words and sentences in your posts. No twitter-speak, please. Thanks for taking the extra time necessary to comply.

Author:  naitik_mehta [ Fri Feb 03, 2012 1:29 am ]
Post subject:  Re: Surface etching of diamonds

My basic question is still there.Why people want to do this?What is benefit?Just cause of better look or something else too?

Author:  Conny Forsberg [ Fri Feb 03, 2012 8:38 am ]
Post subject:  Re: Surface etching of diamonds

Tha majority of these stones are used in tools. Drill heads, dressers etc. It is from a functional point of view this is done. It has nothing to do with jewelry or gems.

Author:  cascaillou [ Sun Feb 05, 2012 11:01 am ]
Post subject:  Re: Surface etching of diamonds

when it comes to rough diamonds sold for cutting as gems, I guess some people are possibly polishing the crystal facets for better revealing their clarity potential, am I right?

Author:  Conny Forsberg [ Sun Feb 05, 2012 12:44 pm ]
Post subject:  Re: Surface etching of diamonds

That is not my experience but I have not been cutting diamonds since the 90's. It seems unlikely though. Maybe really valuable stones...

Author:  naitik_mehta [ Mon Feb 06, 2012 6:48 am ]
Post subject:  Re: Surface etching of diamonds

But just tumbling can achieve this result? There would be some chemical polishing too with tumbling.

Author:  Barbra Voltaire, FGG [ Mon Feb 06, 2012 12:15 pm ]
Post subject:  Re: Surface etching of diamonds

To my awareness, there are no "chemicals" which could put a polish on diamond.
Are there, Conny?

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