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How to Make a Synthetic Diamond

Step 9Admire the Finished Product

Admire the Finished Product
After the mugs have completely cooled, remove them from the microwave.

The oiled graphite will be broken. The others should largely be intact. You'll also find a small lump, slightly larger than a grain of sand where the oiled section was placed.

Congratulations! This is the product of your labors, a genuine diamond.

I took the raw diamond to a jeweler I know and had her test it. She confirmed that underneath the scale material, there's a tiny bit of diamond material. She said that its quality was pretty poor, but it did fluoresce like a "real" diamond.

Now, admittedly, this homemade synthetic diamond is too small and too filled with inclusions to make into jewelry. But, it technically qualifies as a diamond... and I made it, so that's pretty cool.
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23 comments
Apr 3, 2010. 9:15 PMCheathum14 says:

I don't like being "that guy" but it seems there are plenty of others on this site so im going to say it anyway; thats not a diamond. Here are a few reasons why.
1. The pencil lead you used contains a large amount of clay, not just graphite.
2. Microwaves are not capable of generating the heat neccesary to recrystalize carbon.
3. Even if the microwave could reach the neccessary temperature, the pressure required to make a diamond is around 50,000 to 70,000 times that of earth's atmosphere.
4. How is it that you claim to have made a diamond in your microwave if diamonds weren't even synthesized until 1953, six years after the first microwave oven was made? If they had the technology in 1947, why not use it then?

Sorry for pooping your party, but it looks like im not the only one.

Apr 5, 2012. 7:47 PMowlart101 says:
Dude, its a prank.
Apr 30, 2011. 9:35 PMKimberlyP says:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=Apollo+Diamond&FIELD1=ASNM&co1=AND&TERM2=&FIELD2=&d=PTXT

Apollo Diamond

You could use a microwave and an Absorber such as Silicon Carbide to absorb the microwave radiation and convert to heat.

You would need much lower pressures but you would have to have a controlled atmosphere to the Silicon carbide chamber and that chamber would have to have a suitable refractory and need to be kept cool such that its heat up does not cause ionization which results in it absorbing microwaves and heating up as well.

Apollo Diamonds are gem perfect they can only be identified by lack of any defects. Of Course if done at home you could vary input defects theoretically and they could never be identified.

Microwaves are ideal in this process because of the tight control of temperature in connection with the absorber. It is also more energy efficient.

Apr 30, 2011. 9:16 PMKimberlyP says:
Microwaves with a suitable absorber. Silicon Carbide, Zirconium Oxide, Plutonium Oxide and others, can absorb nearly 100% of microwave radiation.

They heat up and radiate in infrared. You need a suitable refractory and you probably want to keep it cool so that it does not heat up and ionize and start absorbing microwave energy.

The temp is achievable.

For small crystals you could use cavitation and therefore not need the high pressures. The crystals would be very small.

For Large crystals you need not have as high a pressure but you do need a controlled atmosphere.

They were using microwaves as early as 1953 at Y-12 to deal with radioactive materials processing.

You may have made Silicon Carbide in a process similar to the Acheson Process if you arced in non controlled atmosphere.
http://en.wikipedia.org/wiki/Silicon_carbide
Jan 29, 2011. 3:13 AMbarkbark says:
About the microwave..I'm thinking that a discovery of diamond-making need not come out the second the microwave is launched..people were pretty freaked by them.. Microwaves for food uses anyway because they were scary..
Hitler refused to allow his troops to eat food cooked it them because they were proven to mutate protein, and mutant proteins become cancerous, still a researched and proven fact, the old documents are still around for public review, online. Microwaves were around in studies years before they were launched, but they recieved passage into the public through a manipulative buy-off, against the will and recommendation of the reviewing doctors of the day on the panels.

So heads were not all about playing with microwaves in popular masses. A few were daring to launch experiments, but its main intention had some sinister purposes even though it was promoted for cool ones. Diamonds on the other hand would've been a lighter area of creative experimentation, dangerous as all science can be. I wish I'd known about the diamond thing earlier--it would've been fun to work with :D! Glad I no longer use a micro, though..
Apr 28, 2010. 4:57 AMTreknology says:
Let me bomb your party.

1. A real diamond placed in a CO2 atmosphere will dissolve into "nothing"--no pressure or heat involved.

2. Fake industrial diamond is not manufactured under such high temperatures or pressures either.

3. An Australian high-school student developed a way of coating materials in diamond micro-dust, using COLD and low pressures--great for making grinding wheels but hopeless for laser focusing devices.

Superheat and pressure is only theory.
Oct 26, 2010. 1:33 PMzoteman94 says:
It isn't only theory, graphite is the most stable allotrope of carbon at ambient temperature and 1atm pressure. (Yes you can convert diamond into graphite in an inert atmosphere at around 1000°C) Maybe there are some ways that don't need ultra high temperatures or pressures, but it is proven that diamond is more stable than graphite at these conditions and thats why it transforms into it.
May 9, 2010. 2:04 PMCheathum14 says:
@Teknology
You didn't quite bomb my party. I know that diamonds can be formed at much lower temperatures and pressure.(Microscopic diamonds can form on the surface of the sun where the temp. is only 10,000 and where there is little pressure) I was just saying that for a diamond of that size (visible to the naked eye) to be formed, it would take more than the pressure and heat a microwave can generate. Also, if i'm wrong, so be it, i'm only a sophomore in high school anyway and i'm taking physics next year.
Apr 29, 2010. 5:46 AMTreknology says:
I was bombing Cheathum14, not you. But I do re-assert that extreme heat and pressure will not be the methods by which "gem" quality diamonds are reproduced--and even then they won't be "gem" quality because they will lack the unique flaws of the natural product.

Of course, if subsequently worthless "pure" diamond can be grown then lenses and other optics will take a massive left turn in efficiency. And yes, I confidently predict that such method will not only validly suck carbon out of the atmosphere, it will turn out rocks in such volume that the South African economy will collapse.
Jan 14, 2011. 7:57 PMmogg says:
Synthetic diamonds are made at about 300deg C, but usually in a pressure vessel using microwave radiation and a "seeding" crystal. You can make diamond as big or small as you want by growing them in a chemically neutral environment (nobel gas/ nitrogen) using CO2. Check out wikipedia, has an article about them. The diamonds are purer than natural sourced diamonds, and are currently being applied to electronics, especially light based circuits.
Go to a big jewelers and ask for yellow diamonds- they are tinted to distinguish them natural ones, but they can come in any colour depending on the material you poison the crystals with. They have the same colour as urine.
I haven't tried it, so can't say if this will work, but I'm skeptical of the chemistry.Once I've destroyed my microwave (it's crap anyway), i'll let you know. (^^)
Apr 5, 2010. 9:31 AMCheathum14 says:

:) Well played. I thought there was something odd about this instructable. Also, pranking me isn't quite that difficult because im the most gullable guy in my county.

Apr 15, 2010. 7:00 AMaqwiz says:
 I hope you don't live in poland. 
May 9, 2010. 1:22 PMCheathum14 says:
haha, i live in texas and i'm gullable, not stupid :)
May 9, 2010. 5:53 PMaqwiz says:
 Oh my bad I misread that, thought you said country. 
Sep 24, 2010. 10:59 AMMr. Potato Head says:
Guess that makes you the stupid one!
Oct 26, 2010. 1:38 PMzoteman94 says:
It can't make diamons for some reasons:
If you heat the graphite at 5000°C it should react with air to make carbon dioxide, also that temps would melt the coffe cups and if you claim that you got a lot of pressure, the cups would simply move and release what is in middle of them, or they would also broke.
The CVD isnt just ionizing carbon and letting it grow, because it should grow as graphite not diamond.
I don't want to ruin your article, but I don't want to see more people damaging their microwaves, wasting a lot of energy (and money)...
Jan 21, 2010. 12:42 PMcoelhobranco says:
I liked!
I will try in my microwaves...
Thanks!

Oct 30, 2009. 5:06 AMprada-shoes says:
if only I could turn this into a jewelery lol
Oct 4, 2009. 11:17 AMthesinner says:
You should have checked the phone book for a local analytical lab. XRD scans will tell you straight up what's in it. My guess is that it's simply bulk carbon left over from your burning olive oil. The probability of any of that carbon to be in the diamond allotrope is only slightly better than a lattice in the pencil lead you've started with. Also note that pencil lead is not pure graphite and is primarily made from clay.
Aug 31, 2009. 10:08 AMianherbert1 says:
didnt work broke microwave
Apr 9, 2009. 6:08 AMTuizner says:
I did something similar to make a diamond abrasive wheel for a grinder. This is a very good use for the small diamonds that are generated from this process. Simply take a carbon fibre (graphite fiber in the US?) fabric (as typically used in the composites industry) soaked in lard or other animal fat and place onto your grinder wheel where you would like the diamond coating. I used lard because it can tolerate higher temperatures than vegetable oil like olive oil. The carbon fabric I used was a thin piece of 12k twill weave fabric - this isnt so important but you must ensure that it is PAN-based rather than pitch (I tried pitch based carbon but for some reason it didn't work - no idea why?). Again the whole lot went into a microwave (mine was 1200W) on full power for one hour ensuring that the piece is covered (I used a Pyrex bowl). After an hour, there is a fair bit of smoke so best do this in the garage. On examination, the grinding wheel is covered in black ash. However if you scrub this off you will see (and certainly feel) that underneath the ash, small diamond pieces have been formed and melded to the grinder wheel. It isn't pretty but it sure works a treat and saves a good £50 too! Bargain!
Apr 1, 2009. 4:42 PMsomeniceguyon says:
what it you soaked alot of pencil lead in olive oil then tied it together and microwaved it? would you get alot of small dimonds? or a couple big chunks that are hopefully big enough to cut and small ones?
Apr 1, 2009. 9:22 AMcfishy says:
This is so cool! Is your woman impressed?

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