“Todd, Thanks for the ultra-informative website. As a geek and a doctor I crave knowledge and you certainly provide it. I would value your opinion on a diamond. My wife has her eye on a 18kt white gold mounting for a 6mm round. I’m looking at Brian Gavin Blue: BLAGS-104060183023, a 0.770 J VS1 Signature Blue round. I know you think highly of Brian and it seems like its hard to go wrong with this diamond at $2477. I’d love to know what you think. Thanks again for the education.”– Greg
I can’t imagine what it must be like as a consumer to buy a diamond online without having a second opinion… sure you can spend the next few months reading all that there is to know about diamonds and end up having a pretty good idea of what to look for and what types of things to avoid, but let’s face it, nothing trumps years of actual diamond buying experience.
So when a visitor to this web site wrote a nice comment and happened to ask my thoughts on a Brian Gavin Blue Signature round brilliant ideal cut diamond, I thought the least that I could do was glance over the details and give the stone a thumbs up or a thumbs down… I figured it would take me less than a minute, but then the left side of my brain kicked in and I had to geek out on the project, so here you go Greg!
Thank you for your inquiry Greg, I’m more than happy to take a look at the characteristics of the Brian Gavin Blue 0.77 carat, J, VS-1 for you… I do think highly of Brian Gavin and his production of diamonds, but one thing that I learned a long time ago is that every diamond must be evaluated on its own merit and not just on the brand name alone. This concept is as true for diamonds as it is for every other consumer product, such as cars, electronics, cell phones, etc. so let’s look at this diamond the same way I would have if I were going to consider buying the diamond for inventory… starting with the proportions.
First off, the good news is that the proportions of the diamond fall within my preferred range of criteria which is essentially the very middle of the range specified by the AGS Laboratory for their zero ideal proportions rating. The center range is what I consider to be the actual target which diamond cutters should shoot for when crafting a diamond because it is the actual “sweet spot” that delivers maximum visual performance in terms of brilliance, dispersion and scintillation… while it is possible to find diamonds that perform well with proportions outside the center range, it can take a lot more time because you have to sort through more stones.
So the critical proportions on this puppy are the 34.8 degree crown angle which is offset by a pavilion angle of 40.8 degrees, this means that the two primary reflective surfaces of the diamond are aligned in such a way that the maximum amount of light is being directed back out of the diamond and up through the top of the diamond, so your wife is definitely going to need a new pair of sunglasses because this diamond is going to be bright! But I didn’t want to just assume that this was the case, so I picked up the phone and asked Brian to pull this diamond out of the vault and take it for a walk… we talked Diamond-ese for a bit and the consensus is that this is a beautiful diamond which is full of life and performed well under a variety of lighting conditions. The strong blue fluorescence was visible from a side profile when the diamond was viewed in direct sunlight via the windows in Brian’s office. And then as you might imagine, we ended up getting into a 20 minute discussion on how beautiful fluorescent diamonds are and how we can’t believe that more people don’t buy them and how we all used to sell more of them when we sat with people face-to-face and were able to actually show people how spectacular blue fluorescent diamonds get and yadda-yadda-yadda…
Oh speaking of which… this is an actual picture of the strong blue fluorescence within this diamond as seen using black light. And the reason that I say “actual” is because while I was on the phone I had the opportunity to ask Brian whether this image was a really cool piece of stock photography or an actual photograph and as he chuckled he explained how they take an individual picture for every diamond details page that they build for their site… I love that kind of attention to detail and truth be told I expect nothing less from Brian Gavin Diamonds.
Now obviously the strong blue fluorescence within this diamond is not going to look like this under normal lighting… but all that it would take for you to be able to show this very cool effect to your wife would be a trip to a local aquarium shop or maybe a night club which features black light. I had the opportunity to conduct an impromptu diamond grading lesson on blue fluorescence while walking through the exhibit at the Toronto Space Needle a few years ago when some people noticed that their diamonds were glowing different neon colors under the black light.
Now usually after I look at the proportions information on a diamond and verify that the overall cut grade of the diamond is AGS Ideal 0 which it is… I take a look at the plotting diagram for the diamond to determine the type of inclusions present within the diamond. In this particular instance, the VS-1 clarity grade of the diamond is based upon the presence of a small group of pinpoint size diamond crystals commonly referred to as a cloud which is located just to the left of center on the table facet as indicated by the red circle on the plotting diagram. Diamond crystals in the form of crystals, pinpoints and clouds are my favorite type of inclusions because they are essentially just tiny little diamonds that were trapped within a larger diamond crystal as it formed… so these are going to look like tiny sparkling stars within the diamond when viewed using magnification. But just to be sure, I asked Brian to whip out his loupe and talk to me about the inclusions… as is typical for a VS-1 clarity grade, the full extent of the cloud was not readily visible to Brian, but he was able to see one or two of the pinpoints twinkling back at him as he rocked the diamond back and forth to move the light through the stone. Sounds good to me.[separator]
I also took a look at the images for the AGS ASET and the Ideal Scope and both look perfectly fine… there is the normal hint of light leakage around the perimeter of the diamond, it is well within my range of expectation. I can see from the crispness of the arrows within the images that this is a finely crafted stone which is likely to exhibit nice contrast. I’m certain that this diamond will exhibit high performance in terms of brilliance, dispersion and scintillation. I hope that you’ll send me a picture of the mounted diamond to add to this post if you end up purchasing it for your wife Greg, I’m sure this diamond will provide many years of enjoyment for her.
Now I wrote this review for Greg by request, so if you happen to be reading this and you’re not Greg, please don’t run off and buy this diamond just because I happened to write a review on it… there are plenty of other wonderful Brian Gavin Blue Diamonds available and I’m happy to take a look at them for you also, just ask. It really is that simple.
Todd Gray is a professional diamond buyer with 30+ years of trade experience. He loves to teach people how to buy diamonds that exhibit incredible light performance! In addition to writing for Nice Ice, Todd "ghost writes" blogs and educational content for other diamond sites. When Todd isn't chained to a desk, or consulting for the trade, he enjoys Freediving! (that's like scuba diving, but without air tanks)
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