How Lab Grown Diamonds are made - and the difference between HPHT and CVD Lab Grown Diamonds.
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- Опубликовано: 21 дек 2021
- There are two types of Lab Grown Diamonds - CVD or Chemical Vapor Deposition, and HPHT or High Pressure High Temperature. In this video we discuss the different growth techniques and how humans have been able to grown their own diamonds instead of waiting millions of years for the earth to do so. HPHT is the original technology that was developed in the 1950's, that is still used today. The CVD process was developed in the 1980's. Both processes have continued to be perfected to produce perfect gem quality diamonds in a lab.
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Watched your presentation in preparation for a position within the industry. Can't thank you enough for a brief but information heavy overview. For what it's worth I'm sold on the CVD diamond - from how it's grown to it's indistinguishability (?) from natural (Earth) diamonds. Fascinating and beautiful. Thanks again!
Thank you so much 🥰 i found your video more useful than the other 5 I watched before this ❤️
Hi Hilary, I am glad you found it helpful - that is our goal!
Out of the two options, I'd prefer the HPHT lab diamond personally...
Very informative video!
That was very clear. Thank you. I’d read another explanation that didn’t make sense to me.
Glad it was helpful!
Great video, so helpful. What would the differences be between the two if they have the exact same color, cut, clarity, etc. Would CVD still be better? or at that point does it not matter?
Thank you! CVD technically would be the purer of the two options. All CVD diamonds are type IIa, which means they come out of the process whiter, and without the presence of nitrogen or boron. In smaller lab grown diamonds it does not matter, but I would say as you get up into the larger carat sizes I would go CVD if possible.
THANK YOU THANK YOU THANK YOU!!!! I spent hours comparing and got all puzzled because other videos, especially one from a guy (That Guy Osiris) that mentions he prefers the HPHT method, but comparing (again, for countless hours) then I found the CVD ones much cleaner, prettier and bring out the excellence of a magnificent rock. So, after watching this video I actually chose one, a CVD, and is practically flawless, the two itty bitty minuscule inclusions are not even able to be captured with a naked eye and take a lot of patience to find them with the magnifier and only because the IGI certificate pointed out where they were. It worried me before that the other youtuber mentioned they are enhanced afterwards and is not therefore as genuine or "closer to nature" as the HPHT process. But, I don't mind.
I was able to promote my wife's wedding ring, from 30 years ago, with a 0.52 medium blue fluorescence, G-H, SI2, fair, to a stunning 1.60, F, VVS2, Ideal, Type IIa, no fluorescence. I wish I would have found your video first and do business with you, but fear not, because I will be looking for the diamond studs (1 carat each) soon.
I have been a good provider, but I never made good on my promise I made when I proposed, to one day get her "the carat". She never cared, we had a lovely wedding, she was the happiest, gorgeous and most virtuous bride anyone had seen, tons of family and friends were happy for us and we had a lovely life, she did not need it but it always bothered me and I could no longer live with that pending. So, spending tens of thousands seemed foolish now in our late 50s, but I could not ignore that stone for $1.610. Hence, yes, I am grateful this is now a possibility for so many of us who may need to save a bit and wait a few months, but can do it for those prices.
Well, now that our jeweler replaced the previous one and welded that gorgeous basket with that awesome 7.52mm round rock, it sure was worth the wait. And, timing is perfect because I followed the "lab diamond" issue for a decade and I am now a believer, even more, a proud buyer of lab diamond. I confess that a while back I would have not wanted people to know, but now I have no problem if I am asked, it is perfectly fine, like a rose cultivated in a greenhouse versus the one in grandma's garden. Cut them and place them on the flower vase and they are not any different from one another.
A friend told me that a test tube baby and one conceived naturally are both humans, one needed "scientific" intervention but nature did the job on both and the result is the same and none is different from the other. I prefer the rose one though....ha!
Thank you! Let us know if we can ever be of any help to you.
Wonderful explanation. Can you please guide me which diamond tester is the best in markeet to identify labgrown diamonds? I will be waiting for your reply anxiously
There are a few. The least expensive one that will detect a lab grown and Earth Mined diamond is the: SmartPro Tester.
Hey so i just got a HPHT Type 2. Whats the difference from type 2a and type 2? Also its a vs2. No fluorescence but has a very strong phosphorescence of yellowish orange. Does this make it rare and or effect value?
Hi Chris,
To be a Type II diamond means it must be either a Type IIa or IIb, but either way, both of these are the purest form of diamond with no traces of nitrogen. Type IIa are the most chemically pure, with no traces of nitrogen or boron. Type IIb diamonds have traces of boron. Type IIa diamonds are incredibly white in color. If it is phosphorescent, it likely is a Type IIb diamond as they can have this phenomenon, especially in lab grown. I hope I have answered all of your questions!
Hello thanks for the great video! Knowing that natural diamonds attach over thousands of years under the ground I wonder how Lab diamonds can recreate that in weeks? Almost seems impossible for the lab diamond to last long term. Have you seen any Lab diamonds change from original color or develop hairline cracks?
Hello Bitcoin - Thanks for the question, and a great question at that. Earth mined diamonds take about 900 Million -3 Billion years to form - that's one of the reasons that earth mined diamond prices are high.
Lab grown diamonds take roughly a week to a month to create. In order to do that process in so short a period of time, the heat and pressure are turned up slightly to encourage that process to move faster. While it seems like this would create diamonds that do not last, it actually does not have an impact on durability. Keep in mind, earth mined diamonds can crack, and break depending on the type of inclusion that are in the stones. We do not see this happening with lab grown diamonds as much because the quality of the diamonds is so much higher, and they have fewer inclusions. A few of the older quality lab grown diamonds that were made in the early 2000's were more prone to color change. Since the technology has evolved and improved so much over time, that is absolutely not a concern anymore! The only way a diamond could change color is if it were exposed to HTHP treatment (high pressure, high temperature), which is true of both lab grown diamonds and earth mined.
Which do you prefer CVD or HPTH LG diamonds for engagement rings?
Personally, I prefer CVD Diamonds over HPHT. While the process is slower, the product yields a purer stone, those being type IIA. That being said, I have seen plenty of gorgeous HPHT stones! Please let me know if you have any other questions - Anne
My diamond tester lights blue when i test the diamond from the top but green when i test it from the sides! Thats on a hpht lab diamond. Any idea why?
Hi Marwan, What kind of diamond tester are you using to test?
For example, if you make a “Flawless” D Color CVD diamond, would it’s color fade after time? I read that HPHT diamonds do loose it’s clarity after time
No, the color will not fade overtime. The only time that the color changes on a lab grown diamond is after exposure to extremely high temperatures of very high UV light - and these color changes are not permanent. Please let us know if you have any additional questions! Thank you!
@@mjgabel Okay thank you! Would you agree that CVDs are better then HPHTs? Since they are 100% Carbon and come out with a better clarity. Many reviews I read said that “HPHTs” are better.
@@user-wl3mu5tt4h Yes, we prefer CVD over HPHT. Especially with larger carat goods.
I recently purchased a HPHT Type II Diamond VVS1 D. My jeweler preferred this over the CVD, why is that? They also charge more for HPHTs over CVDs
Some prefer Burger King over McDonalds, Some prefer Tim Hortons over Dunkin.
I know the reasons why some sellers / jewelers prefer HPHT over CVD (that is covered in one of our videos) but personally and professionally I prefer CVD.
And yes, HPHT are more expensive because they cost more to create.
Hi I recently bought a hpht diamond, how do I find out if it’s type 2?
Is the diamond certified? If so, it may state it on the certification.
Hi I bought 1 Carat HPHT Do you think giving the diamond to my fiancee will show up as moissanite or as a diamond on the diamond testers?
A true lab grown diamond will test as diamond, because it is a diamond. All lab grown diamonds will test as diamond,
*** I DO NOT recommend NOT telling your finance that the diamond is a lab grown diamond. I would suggest being honest and do not pass it off as an earth mined diamond.
@@mjgabel some people told me hpht diamonds don't pass the test i'll tell her it's a lab product but i don't want to be mistaken for moissanite when you go to the jeweler
@@Kubilaygokhan Whoever told you that is incorrect. Those testes that you are referencing are also not always 100% accurate. We have had diamonds test Moissanite from time to time. We know what moissanite looks like, so we know, but not all testers are full proof.
My suggestion, get it appraised. Be sure to go to someone that is versed and qualified (gemologist) to do the appraisal. Then you will have it in writing, with a replacement value. I would also get it insured.
Is one better than the other? When shopping how do we know if a diamond is CVD or HPHT?
Hello, It should indicate on the certification. I would NOT purchase a lab grown diamond unless it comes with a diamond certificate. (IGI, GCal, GIA are the most popular that will see)
@@mjgabel Thank you, I won't. But I am still confused. Is one better than the other, CVD or HPHT?
CVD technically would be the purer of the two options. All CVD diamonds are type IIa, which means they come out of the process whiter, and without the presence of nitrogen or boron. In smaller lab grown diamonds it does not matter, but I would say as you get up into the larger carat sizes I would go CVD if possible.
@@mjgabel thanks. What are you considering larger? I'm looking for 1 - 2 carats.
@@mmt4013 For a 1-2ct range I would go with CVD. If you are looking, we can provide you with some figures. Let us know if you need help.
Which would you recommend for a round 3 carat lab diamond Hpht or cvd
CVD for sure. If you need help finding the right stone we are happy to help.
@@mjgabel why is it that all over online it says that hpht is the better option? What’s the main reason you’d say cvd is better ?
@@annaaslanyan777, we actually just did a video on this that will be posted shortly - subscribe to our channel to catch it! In short, personally I have seen both types of lab grown diamonds being pushed online, and when you look closer into who is publishing these articles, they often are linking to a specific company that specializes in one vs the other. I have found that CVD manufactures put down HPHT, and HPHT put down CVD diamonds. The reason I prefer CVD diamonds is that on baseline are a more chemically pure diamond, with no color zoning, or metallic inclusions - there is no boron or nitrogen used in the process. The gems produced tend to be higher in color, and the post-growth treatment is done to simply bring out the best color possible. HPHT diamonds, especially ones with SI clarity, tend to have inclusions that are right in the center, and if they are lower than an F color, can show a blue hue. Either option is a great alternative to an earth mined diamond, for the value. Let me know if you have other questions!
@@annaaslanyan777
Here is that video referenced above: ruclips.net/video/N742bIFvoBs/видео.html
How do they get coloured cvd diamonds?
Great question! Colored lab grown diamonds are actually made using HPTP growth, not CVD growth. They are created by adding impurities into the growth process. For example, the additional of Nitrogen impurities will result in yellow or yellow-orange diamonds, and the introduction of boron will produce blue diamond crystals. Please let me know if you have additional questions that I can answer for you!
@@mjgabel ah ok. Thanks
I have heard that HPHT is preferred over CVD because CVD includes post-growth treatment.
Is this true, and is it important?
Thank you for the video!
Hi! The post-growth treatment that occurs with CVD diamonds is actually HPHT. This is typically done to help potentially improve the color of the diamond. However, in the end you are still left with a diamond that is more chemically pure than just an HPHT diamond alone. I would not consider it to be a down-side to the CVD process, but it certainly is a personal choice! Please let me know if you have any additional questions that I can answer for you!
@@mjgabel That is interesting. Thank you for your reply!
Can a Laboratory grown diamond also be GIA certified?
Yes.
There are 3 (in my opinion) labs that are best for lab grown diamonds:
1) GIA
2) IGI
3) GCal
For natural earth mined diamonds by top 3 are:
1) GIA
2) AGS
3) IGI
Mam which is better one ?
I would say that CVD diamonds are better than HPHT because of how chemically pure they are when they form.
Hpht they are pure grow no post color treatment.
@@isaackolton9783 i dont understand why would she classify CVD as a better preference, as far as I know, HPHT method has been used since 1950s, meanwhile you have CVD method that starts in the 80s... with HPHT they planted diamond seed and no chemical...
I hear CVD diamonds cost much less to make than HPHT. So I wonder if the jewelry industry is trying to promote CVD by saying it’s better than HPHT.
Would the natural diamond that has been treated with HPHT pass the test?
What test are you referring to?
@@mjgabel I'm referring to any professional diamond tester.
@@TranquilBlackout - It will test diamond. The diamond tester will not detect the HPHT treatment.
@@mjgabel Thanks :)
What is a diamond seed?
A diamond seed is a tiny diamond particle that serves as the foundation for creating lab grown diamonds
@@mjgabel so do you still need to mine a part of a natural diamond to make lab grown diamonds?
You need a mined diamond, not sure if you can use a lab grown seed. I will have to look into that.
@@angelguy72
Is it true that labs that produce lab diamonds hire a lot of obese people to do the high-pressure part of the hpht where they would sit on the diamonds?
Bought my wife a diamond from Diamond NEXUS. The quality is amazing. Will never go back to conflict Diamonds ever.
Diamond NEXUS is actually a lab grown diamond simulant - so it is a material other than diamond that is proprietary to Diamond NEXUS, but does mimic the look of a diamond. The Lab Grown diamonds we sell are actually 100% chemically the same as earth minded diamond, and actually are a purer form.
Dabeers are the ones who control about 90% of the diamond industry. They are a terrible family. They have killed alot of families and get extra benefits if you catch someone stealing. Lab made diamonds are the way to go! FK Dabeers!!! I have diamonds on a vs2 level and they still look like CZ to my man made diamonds!! Looks like what a perfect diamond should look like. Last forever anyways!! Diamonds are so so stupid!!
HPHT sounds like a tank round lol
Wonder why she didn't mention moissanite
Because a moissanite is not a Lab Grown Diamond, it's a moissanite.
@@mjgabel thanks for the reply. I mean when you mentioned alternatives
@@skankhunt9078 Oh, right. We do cover that in a different video here: ruclips.net/video/hXhPpYvXncM/видео.html
Women never were interested in diamonds.They were turned on by the horrific amount of money that their lovers were obliged to pay to purchase the diamond. They viewed that as a test of the love of their partner. Now lab grown diamonds ara available women don't want them.