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| HOME : FORUM : EDUCATION : DIAMONDS : what kind of machine is used to make fake diamonds |
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Post#1 @
12-31-00
, 08:11 PM
i was wondering what kind of a machine is used to make diamonds what company makes them and how do yuo get metal fragments out of the diamond when it is forming e-mail me at chuckh@datagateinc.com thank you all for your helpLab: : : t at http://www.diamondgrading.com/askdiamondtalk.html |
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Post#2 @
12-31-00
, 08:14 PM
just if your wondering why i ask this i am doing a project for my school very imporant for my grade |
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Post#3 @
01-01-01
, 12:48 AM
"Fake" like a CZ (cubic zirconium) or "fake" like a man-made (real carbon) diamond? |
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Post#4 @
01-01-01
, 09:38 AM
Duckman: . I will answer your question in a form most appropriate for a 'school paper' (I was once a teacher). . The term "fake" means another material used as an imitation or substitute. This other material may be man-made or natural. Most common man-made substitutes are YAG (yttrium-aluminum garnet), GGG (gadolinium-gallium garnet), syn.rutile, and cubic zirconia (a form of zirconium oxide rarely found in nature). . Natural substitutes are usually zircon. White sapphire is a nice alternative. I once cut white topaz, on request, as a fake. . The term "synthetic" means the same thing made by man = same chemistry, same crystal structure, etc.; these are usually better than natural because they are perfectly-formed under controlled conditions. Only very recently have man-made diamonds been made of gem quality, size and cost. Sorry; I don't know how it is done. . For several decades GE has made tiny synthetic diamonds which were greenish and preferred over natural diamond fragments (bort) for industrial abrasives because they are perfectly-formed, thus easy to distribute uniformly and of predictable performance (diamond hardness varies 10:1 in different directions). . In the last 20+ years DuPont has made polycrystalline diamond, wherein each tiny particle (even 1 micron or less) consists of thousands of submicroscopic crystals all differently-oriented. This is done by filling an iron tube with carbon, imploding the tube by explosives outside it, then dissolving the iron. The result is black because light does not pass through, it occurs rarely in nature by the name 'carbonado' and the particles are rounded. They can be size-graded easily and act as equal hardness in all directions. They are best for gem-polishing if the lap is grooved to hold them in place; the natural fragments grip better on a smooth lap (I use tin) because they bite into it. . There are no machines, especially with metal particles, in making any of these. . There are machines, however, involved in cutting and polishing them. Thin copper discs with diamond dust are used to saw them. Laps (rotating discs, usually copper for diamond, called 'scaifes') impregnated with diamond dust are used to 'lap' (wear down) the surface of the diamond to make the flat surfaces called 'facets'; this is vey slow. . The diamond is held in a clamp device so it can be rotated and tipped to the desired angles. . I hope this helps and that I did not tell you too much. Good luck with your paper. [Edited by beryl on 01-01-2001.] [Edited by beryl on 01-01-2001.] |
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Post#5 @
01-02-01
, 01:27 AM
[preaching] As a former teacher myself, I think that Beryl has been very gracious in the information he has given you. However, the idea of doing research on the Internet, or in any other medium, is to actually track down the information yourself--not ask people to find it for you. If your essay has to be supported by reliable sources, I would be very surprised to find a teacher who would accept Internet chat rooms and bulletin boards as valid source. I did not when I taught. Furthermore, I think that a basic review of the rules of punctuation (it's not just for fun), capitalization (too lazy to hit the shift key?), and spelling (imporant) would do far more to improve your grades than spectacular information on fake or synthetic diamonds. [/preaching] Shelby |
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Post#6 @
01-02-01
, 07:17 AM
Duckman: . I disgree with 'shelby'. The person who gets his information in the most effective way will be a leader. . If he gives credit he will probably become an executive. If he doesn't, he may well become a politician. . It would have taken many hours to find this information and that about DuPont diamond is hardly available (I did the tests); on the other hand, it is not important to your paper. . I commend you for choosing this new source of information. Just be aware that you are not always dealing with experts and that you may get false information. On the other hand, I have seen much wrong information in books. Bruce Harding, author of "Faceting Limits", etc. |
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Post#7 @
01-02-01
, 07:20 AM
PS: . You may be able to get info about Russian synthetic diamonds from Anton Vasiliev at www.antonv@aha.ru . He is very knowledgeable and helpful. |
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Post#8 @
01-02-01
, 03:05 PM
Bruce, If you haven't done so, perhaps you should email Duckman your name and your credentials so he can (hopefully) credit you appropriately in his report. Thanks for responding back via DiamondTalk, like all of your posts - it was an interesting and informative read. nakster |
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Mr.Atlas: . Thank you for providing that information; it was very interesting and informative to me, as well. Bruce Harding |
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