What is BETTER HPHT or CVD Lab Grown Diamonds? Which is the BEST CVD or HPHT lab grown diamonds

Thanks for this info. I just got a CVD diamond and absolutely love it. I didn’t have a preference for either method, but my ring turned out gorgeous.

Very informative! Appreciate your honest and professional take on this evolving issue. Thank you!

Really helpful! Studying gemology so this is really good info!

Really helpful thanks for the info 4:09

This is a phenomenal video. Thank you.

good

Thanks! Few questions... Would you place a high priority on screening CVD diamonds that are "as grown"/no post growth treatment? Would you still prefer a CVD stone that has post growth treatment to an HPHT stone without treatment? And lastly, when IGI states a CVD diamond "may contain post growth treatment" does this simply mean they cannot tell and that it may or may not, or that it does but no evidence of it is visible? Seems to be some ambiguity over what this means. My main concern is trying to find ways to weed out the brownish tint on some CVD diamonds that can be present even if the diamond is graded as colorless (DEF)

Thank you for your infomation. Further more, could you please knowledge me on the hardness between the 2 types of the lab created diamond? ( not means according to molh scale which is 10). Thank you.

Great video! Thank you for increasing my knowledge! So, after many years of scoping earth-minded diamonds, I'm now doing a deep dive on the lab-grown ones. One thing I keep noticing in the lovely new 70x high-resolution videos, is graining. I kept looking at them and thinking, it says polish is excellent, so why am I seeing lines that make it look like someone has taken low-grit sandpaper to this diamond??? I finally got around to googling "striations in lab grown diamonds" and read (very quickly) that the lines are in the stone itself (makes perfect sense) and that this sometimes this happens when they start and stop the growth process too many times (reasons not stated, "fixing" something I assumed). Anyway, the questions I have are these: 1) is the start-stop reason I read about CVD stones correct, and 2) how much of these striations should I accept before they impact overall clarity. I've always been an eye-clean is quite good enough girl, but I confess seeing all those striations kinda weirds me out. They seem pretty obvious, to the point that some of the stones I see make me concerned about the overall clarity/haziness of the rough and the finished stone. I've also noticed that the price per carat of larger stones, starting around 2 cts (I'm looking at some OECs and OMBs) can be SIGNIFICANTLY higher (HPHT vs CVD perhaps?) but to be fair the clarity of those stones under the high magnification of the videos, also seems higher. I know this is all over the place, but can you elaborate on what might be going on here? Telling me I'm overthinking this IS an option. I do tend to do that. ;)

Been in the industry for 7 years. There is no difference really CVD/HPHT i wouldnt worry about it as the customer. On our side as the retailer our wholesale cost is really the same whether its CVD or HPHT... I have also heard that technically cvd is "the most pure" they are type 2a. But i really do not think it matters.... Same with post growth treatment. Our cost is the same post growth/no post growth. It dosent really make amy difference..... You shouls really just be focusing on 4cs gotta watch out for IGI i have seen F's that should be H's and are brown in color.

While the nuances are subtle, CVD and HPHT are as different as pulled synthetic ruby versus flux grown synthetic ruby.

I read somewhere that there is a possibility that a post treated CVD diamond may revert back to its original condition years after the treatment. Is this possible? Also it said that the post treatment can make the diamond hazy.

I still prefer my HPHT diamond.

Very nice video! I have one question: Can a CVD diamond be treated with HPHT?Thank you!

This is a VERY informative video. I just purchased a 4.53 carat emerald cut diamond, VVS1, E color, Excellent cut and symmetry, type iia. It is CVD made. I think what was left out in this video is because of the way CDV stones are created (grown in 1 direction) they can create a graininess in the stone that is not required to be disclosed on a diamond report. This graininess can often times not be seen in pictures with some e-commerce sellers and are usually identified by seeing a diamond with fantastic 4 C's but at a crazy low price (from my experience shopping for diamonds). For example, I purchased my diamond for $4500.00, this was a great price. I checked the market again and saw a similar diamond but was roughly smaller by half a carat. This diamond had zero pcitures available and was being sold for 2.5k which leads me to believe there are extremely visible growth marks on the stone. What are your thoughts on growth lines on CVD stones?

All I care is me liking the look, size and shine;)) more bling is better. I’m owning 1,5 carat lab grown diamond in like Cartier 1895 setting and it was given to me so I have no idea if it’s hpht or cvd. All I know it’s to perfect (clarity and color)and it’s to white in my opinion (if tit make sense). I bought 4,55 carat wedding band also in d color vvs hpht lab grown and I love its shine. Still if I would be able to afford I would choose natural one.. and surprisingly in color F (perfect clarity and cut of course) I just like that shade, or simply I feel it matches better with my skin shade.

Do you feel like the longevity of either type of lab grown diamond is the same as earth diamonds? I have heard that cvd diamonds aren't as strong as hpht and could crack more easily

Which will pass the electrical conductivity diamond tester? CVD or HPHT? Also will it glow in the dark?

I have bought many lab grown diamonds. I need to know why NONE of the HPHT stones I have bought test as diamond on my testers? I do not care which method is used to grow the stone, but it MUST test as diamond. I have a small business and I buy jewelry and diamonds, rings etc for some friends and customers. I cannot sell a lab grown diamond, telling my customer it is a real diamond, have it not test as diamond on a tester. Can you guys tell me why the HPHT does not test?? Thanks!

CVD Type IIa is the most pure without any impurities. HPHT Type II have Impurities. it all depends which lab machine in which country creates it.