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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: OT: Marcury has a layer of diamond 10 miles thick, NASA
 spacecraft finds
Date: Sat, 3 Aug 2024 00:00:39 +0200
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On 8/2/24 23:29, Ralph Mowery wrote:
> In article <v8j0d5$2t70j$1@dont-email.me>, bill.sloman@ieee.org says...
>>>
>>>   From what I could find in a quick search the industrial diamonds are
>>> only about 10 to 20 dollars per carat versus the several thousand dollars
>>> the jewel  quality ones would cost.  That is where I base my
>>> 'worthless' price at.
>>
>> Cheap isn't the same as worthless.
>>
>>
>>
> 
> My bad choice of words.  I should have said something more like they are
> not worth much money.  They are very useful in industry, just do not
> cost anything at all like the jewelery ones.
> 
> Years ago I had an uncle that worked for a brick company and he used a
> saw to cut the bricks for samples.  He had saved a jar full of diamonds
> that came off the saw blades.  Thought he had some big money comming to
> him.  Found out that that whole jar would only sell for a few dollars.
> 
> 
> 

Diamond is amazing. We had this benchtop wheel grinder to shape and
sharpen steel turning tools, and somebody had tried to grind a piece
of aluminium on it. A diamond-tipped wheel dressing tool went through
it as if it was butter. It's kind of amazing to see a grinding wheel
yield so easily to a tiny piece of diamond.

Jeroen Belleman