Most of the Leo Diamond Reviews which you’ll read online are written by people who love the Leo Diamond because they purchased one from Kay Jewelers. No doubt that they are mesmerized by the incredible sparkle displayed by their Leo Diamond. Of course at the time they purchased their Leo Diamond, it was being flooded with full spectrum jewelry store lighting. Everybody knows that jewelry stores use special lights which are strategically positioned throughout the jewelry store to make even poorly cut diamonds look incredible! I’ve seen diamonds so included that they look like crushed rock quartz look amazing under jewelry store lighting. But this is more of an observation than something that you need to be concerned about as far as Leo Diamond Reviews go.
What you probably really want to know is:
How good does a Leo Diamond look under normal lighting circumstances?
What kind of sparkle can you expect from a Leo Diamond when it is not being pumped full of halogen light?
And whether a Leo Diamond is going to deliver the balance of brilliance and dispersion (fire) that you could get from a round brilliant ideal cut diamond with a standard facet structure.
These Leo Diamond Reviews will answer those questions for you and help you decide whether a Leo Diamond is the best diamond for your preference of brilliance, dispersion and scintillation. One thing which sets this Leo Diamond review apart from other Leo Diamond reviews that you might read online, is that I am a professional diamond buyer. I’ve got more than 30 years experience buying diamonds of exceptional cut quality and visual performance for the trade.
The producers of the Leo Diamond prominently advertise on their web site, which is pictured to the left, that the Leo Diamond is the “first diamond ever independently certified to be visibly brighter”. I’m here to tell you that statement is not as impressive as it might sound. Let’s start by breaking that sentence down. It clearly says that the Leo Diamond is the “first diamond ever independently certified to be visibly brighter” it does not say that it is the only diamond which is visibly brighter. The sentence merely states that the Leo Diamond is “the first one” to be independently certified as being brighter (than other diamonds). This simply means that the producers of the Leo Diamond submitted their diamond to Gem Ex for evaluation before anybody else…
Notice that the statement does not read “The only diamond to be independently certified as being brighter than all other diamonds…” or anything close to that effect. So what does this sentence mean to you as a diamond buyer? Absolutely nothing, despite what all of those Leo Diamond Reviews will tell you. In my opinion, this is little more than marketing jargon. Hyperbole which has been cleverly worded to make something useless sound impressive. For some reason, practically all of the Leo Diamond Reviews which I’ve read seem to repeat this nonsense.
In order to fully understand what the marketing guru’s behind the Leo Diamond are claiming, which is essentially nothing credible, you first need to fully understand the terms which they rely on to support their advertising claims. Let’s start with…
Within the gemological community, the term “Brightness” is the amount of “white light” produced by internal and external reflections which are visible within a polished diamond. This is determined by viewing the diamond from a face-up position, which is the same way you’ll view the diamond when it is set in a ring… Lay people refer to diamonds being “brilliant” and “brighter” because “Brilliance” is used to describe how bright our human eyes perceive a diamond to be.
However within the diamond industry, the term “Brilliance” is not only used to describe the volume of light return, but also the “perception of intensity” created by the internal and external reflections of white light. Again this is judged by looking at the diamond in a face-up position.
However, the “perception of intensity” can also result from a diamond exhibiting a high level of contrast. As can be seen within the light and dark regions of this 0.917 carat, H-color, VS-1 clarity, Brian Gavin Signature round brilliant ideal cut diamond pictured to the left. This diamond is cut with the 57 facet structure, which is standard for a traditional round brilliant cut diamond.
This diamond is cut to proportions which are recognized throughout the industry as producing the highest volume of light return and a virtual balance of brilliance, dispersion (fire) and scintillation… so the diamond is not more brilliant than it is fiery, the different types of sparkle are evenly distributed throughout this type of diamond.
There are two ways to increase the brilliance (white sparkle) of a round brilliant cut diamond, the first is to cut the diamond to a very tight range of proportions, and a level of optical symmetry that creates the high level of contrast that is visible within the Brian Gavin Signature round ideal cut diamond pictured above… but it takes four times longer to polish a diamond to this level of perfection.
The second approach is to simply increase the number of facets on the diamond. This has the effect of increasing the number of virtual facets which are created by the overlapping of physical facets on the diamond, which creates more sparkle… this sounds great since everybody wants to see more sparkle in their diamond, and this is probably the reason why the Leo Diamond incorporates a facet design comprised of 66 facets as indicated by the statement to the left which appears on their web site.
However by increasing the number of virtual facets, the flashes of light are actually smaller in size. And when sparkle is smaller in size, our eyes are unable to diffuse the light into full spectral colors, thus the light is primarily interpreted as brilliance.
Once again, the term” brilliance” is used to describe reflected white light, but dispersion which is also known as “fire” requires larger flashes of light which enable our eyes to disperse the light into spectral colors.
If you take a moment to examine the advertising claims used to market all of the modified round brilliant cut diamonds which feature more than the standard 57 facet design of a traditional round brilliant cut diamond, you will see that all of them describe their diamonds as being the most brilliant, more brilliant, the brightest, etc. These claims are accurate only because the diamonds produce smaller flashes of light, which are primarily interpreted by our eyes as white light.
However if you want a round brilliant cut diamond that exhibits a virtual balance of brilliance (reflected white light or white sparkle) and dispersion (reflected colored light or “fire” as it is commonly referred to) the best option available is a standard 57 facet, round brilliant cut diamond. Preferably one that has a crown angle between 34.3 – 34.9 degrees, which is offset by a pavilion angle between 40.6 – 40.9 degrees. And which has an overall cut grade of AGS Ideal-0 or GIA Excellent. With a total depth between 59 – 61.8% with a table diameter between 53 – 58% and a thin to medium, or medium to slightly thick, faceted girdle with no culet.
In a perfect world, the diamond will exhibit a crisp and complete pattern of Hearts and Arrows like the Brian Gavin Signature round diamond pictured to the left.
The only time when I’ve seen a round brilliant cut diamond with more facets than the standard 57 facet count, actually look good in terms of the balance of brilliance and dispersion, is when the diamond weighs more than three carats and the resulting virtual facets happen to be large enough that the sparkle created by the diamond is still big enough to be interpreted by our eyes in full spectral hues.
Of course all of this is a matter of personal preference, and I happen to prefer round brilliant cut diamonds which exhibit a virtual balance of brilliance and dispersion. However you might prefer a diamond which exhibits more brilliance than dispersion, or more dispersion than brilliance. In which case you might like the look of a Leo Diamond, but I would still recommend restricting your search to one which falls within the range of proportions outlined above, because it will provide the highest volume of light return.
Feel free to send me a copy of the lab report and/or a link to the lab report if you’d like me to look it over. I’d be happy to write a few more Leo Diamond Reviews which feature specific Leo Diamonds. Especially if you are able to obtain the full details of the Leo Diamond you are considering, such as the complete proportions and reflector scope images.