Path: ...!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Jeroen Belleman 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 Organization: A noiseless patient Spider Lines: 32 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 02 Aug 2024 23:57:56 +0200 (CEST) Injection-Info: dont-email.me; posting-host="4a944541d791877ab2a58df9a3920524"; logging-data="3181498"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX189ajaC7ijQ91mYc9XgXhQm" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Cancel-Lock: sha1:fObCdKvkUqHGFJwTka7eX0m4q3k= In-Reply-To: Content-Language: en-US Bytes: 2833 On 8/2/24 23:29, Ralph Mowery wrote: > In article , 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