New Mineral Named After GIA’s John Koivula
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 Post subject: Surface etching of diamonds
PostPosted: Thu Jan 26, 2012 4:12 am 
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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?

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Naitik


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 Post subject: Re: Surface etching of diamonds
PostPosted: Fri Jan 27, 2012 2:16 am 
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I'm sorry naitik, but I don't understand your question.


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 Post subject: Re: Surface etching of diamonds
PostPosted: Fri Jan 27, 2012 3:10 pm 
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Dear Barbara
see this photographs and comment on this


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 Post subject: Re: Surface etching of diamonds
PostPosted: Sat Jan 28, 2012 12:17 am 
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So, what is your question?


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 Post subject: Re: Surface etching of diamonds
PostPosted: Sat Jan 28, 2012 12:18 pm 
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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.


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 Post subject: Re: Surface etching of diamonds
PostPosted: Tue Jan 31, 2012 2:50 am 
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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.


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 Post subject: Re: Surface etching of diamonds
PostPosted: Tue Jan 31, 2012 8:42 am 
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If you tumble diamonds in large quantities together they will reach that state. How long time? No idea...

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 Post subject: Re: Surface etching of diamonds
PostPosted: Tue Jan 31, 2012 1:55 pm 
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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

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Naitik


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 Post subject: Re: Surface etching of diamonds
PostPosted: Tue Jan 31, 2012 3:20 pm 
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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.


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 Post subject: Re: Surface etching of diamonds
PostPosted: Fri Feb 03, 2012 1:29 am 
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My basic question is still there.Why people want to do this?What is benefit?Just cause of better look or something else too?


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 Post subject: Re: Surface etching of diamonds
PostPosted: Fri Feb 03, 2012 8:38 am 
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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.

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 Post subject: Re: Surface etching of diamonds
PostPosted: Sun Feb 05, 2012 11:01 am 
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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?


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 Post subject: Re: Surface etching of diamonds
PostPosted: Sun Feb 05, 2012 12:44 pm 
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That is not my experience but I have not been cutting diamonds since the 90's. It seems unlikely though. Maybe really valuable stones...

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 Post subject: Re: Surface etching of diamonds
PostPosted: Mon Feb 06, 2012 6:48 am 
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But just tumbling can achieve this result? There would be some chemical polishing too with tumbling.


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 Post subject: Re: Surface etching of diamonds
PostPosted: Mon Feb 06, 2012 12:15 pm 
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To my awareness, there are no "chemicals" which could put a polish on diamond.
Are there, Conny?


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