Article says (treated) CVD diamonds should cost 50% of HPHT or "as grown" CVD - is this true?

[DoubleTrouble]

Hi all -

I came across this article about the relative value of (treated) CVD vs. untreated CVD or HPHT diamonds and I was curious if any of the PS experts have an opinion on this. It is the first time I've seen such a stark statement about the relative quality of the two growth processes and I wondered if you agree about the assessment that if buying lab stones we should be seeking a ~50% discount on CVD stones listed as potentially having post growth treatment vs. "as grown" stones.

link to article: https://labdiamondsreview.com/education/hpht-vs-cvd/

Just in case it doesn't link, the article says:

There are two types of lab-grown diamonds:​

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1. HPHT – These diamonds are “as-grown diamonds,” meaning there is no need to use post-growth treatment to enhance the color and clarity of the diamond. What they grow is what we get, just like in nature. This is the good stuff…and it’s much more complicated to grow, so naturally, it involves a higher cost.​

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2. CVD – In this method, the lab grows low-quality diamonds in masses with low color and clarity. Usually, they show grey or brown colors. Since nobody wants such a diamond, the lab uses post-growth treatment to enhance the color and clarity.​

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Now you can tell me, “Yaniv, I don’t really care..” and I understand. The problem is that those diamonds are worth half the price of an identical as-grown diamond. Since most customers are unaware of the difference, the sellers try to rip us off and sell it for the same price as an HPHT as-grown diamond.​

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.... As we covered, most CVD diamonds are produced with low color and go through post-growth treatment. Such a diamond is worth 50% less than an HPHT as-grown diamond. However, since most customers are unaware of the difference, most sellers offer both HPHT and CVD diamonds for the same price.​

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[Karl_K]

That is nuts, mmd are a manufactured product with many steps in the process.

1 factual error is that HTHP can have post growth treatments and sometimes it is not detectable.

CVD + HTHP can result in a better diamond than just CVD alone.
Which should be worth more.. a crappy CVD with a lot of crystal issues or a near perfect crystal CVD+HTHP?

My opinion is good crystal, is good crystal be it HTHP, CVD or a combination of the two.
A diamond with a lot of crystal issues sucks no matter how its made.
No, I am not paying 50% more just for HTHP and no one else should either. Buy well cut diamonds with good crystal and be happy!
That's my 2c :}

 

[lovedogs]

That is nuts, mmd are a manufactured product with many steps in the process.

1 factual error is that HTHP can have post growth treatments and sometimes it is not detectable.

CVD + HTHP can result in a better diamond than just CVD alone.
Which should be worth more.. a crappy CVD with a lot of crystal issues or a near perfect crystal CVD+HTHP?

My opinion is good crystal, is good crystal be it HTHP, CVD or a combination of the two.
A diamond with a lot of crystal issues sucks no matter how its made.
No, I am not paying 50% more just for HTHP and no one else should either. Buy well cut diamonds with good crystal and be happy!
That's my 2c :}

Agree completely

 

[DoubleTrouble]

Interesting ~ thank you ~ I knew I could rely on you guys for clarity!

 

[Garry H (Cut Nut)]

Another point of view is that many newcomers to the growing industry are creating a lot of grainy material that is also more easily broken and with reduced transparency.
They are selling as is, because they are not equipped or prepared to pay others to preform post treatments.
Some believe GIA dropped its notation that there were post treatments to get more business because many people think post treatment somehow relates to natural diamond treatments.
But as others have said.
Thats codswalope

 

[Garry H (Cut Nut)]

In this video from ADA and GIA webinar some of the grown diamond problems are mentioned

GIA Guest Speaker Series: Lindsay Reinsmith & Jason Payne | GIA Guest Speaker Series: Lindsay Reinsmith & Jason Payne | By GIA Education | Facebook

1.6K views, 61 likes, 14 loves, 21 comments, 7 shares, Facebook Watch Videos from GIA Education: GIA Guest Speaker Series: Lindsay Reinsmith & Jason Payne

www.facebook.com

 

[momofive]

I’m in the process of buying a Jann Paul diamond. They use CVD, but they use a high quality sourced seed and have strict quidelines that they follow to make an exceptional diamond. I know I’m paying a premium, but I am also paying for their cut.