Once in a Blue Moon” is a phrase used to describe a rare atmospheric event which causes the moon to appear bluish, this phenomena is usually due to smoke or dust particles in the air, such as those caused by forest fire or volcanic eruption. Blue fluorescence in diamonds is caused by the presence of the chemical boron. When the molecules are excited by exposure to black light or strong ultra violet light, the glow blue, green, yellow, white and sometimes red. The most common color of fluorescence in diamonds is blue, like the blue fluorescence which is visible in this diamond from the Brian Gavin Blue collection pictured below.
One of the cool things about diamonds with blue fluorescence, is that under normal lighting they appear perfectly normal. But they glow this beautiful neon blue color when exposed to black light, and sometimes if you look at them very closely in strong direct sunlight, they might give off a slight lavender blue hue. The 2.25 carat, I-color diamond which I wore in my wedding ring did this and it was really cool!”[separator]
One of the cool things about diamonds with blue fluorescence, is that under normal lighting they appear perfectly normal. But they glow this beautiful neon blue color when exposed to black light, and sometimes if you look at them very closely in strong direct sunlight, they might give off a slight lavender blue hue. The 2.25 carat, I-color diamond which I wore in my wedding ring did this and it was really cool!
I’m certain that this 2.343 carat, G-color, VS-1 clarity, round brilliant ideal cut diamond from the Brian Gavin Blue collection is absolutely breathtaking with because of the very strong blue fluorescence. It is graded on the AGS Platinum Light Performance grading platform with an overall cut grade of AGS Ideal-0 and as you can see from the image on the lab report pictured to the left, the diamond looks phenomenal and exhibits lots of contrast when viewed through an ASET scope, which is designed to judge the light return of the diamond! Do you see all that red? That’s what you want, lots of red, with a hint of green and dark blue arrows! The green area in the center of the table facet is nothing to worry about, it merely indicates that the diamond is pulling light from 45° out to the horizon at that point.[separator]
This diamond is cut to zero ideal cut proportions, more specifically, it is cut to the center range of the spectrum of proportions designated for the zero proportions rating, so it’s cut to the “sweet spot” in light performance… to use the words of legendary diamond cutter Marcel Tolkowsky, the proportions of this diamond have been optimized for light return!
The diamond has also been optimized to exhibit incredible visual performance in terms of brilliance, dispersion and scintillation. It was cut by the same cutters who produce all of the Brian Gavin Signature Diamonds. The only real difference between the two lines of Brian Gavin Diamonds is the presence or absence of blue fluorescence.
In terms of inclusions, this diamond contains a few crystals, clouds, needle and pinpoint size diamond crystals, all of which are insignificant, the diamond is going to be completely eye clean from a top down perspective, which is how diamonds are graded for clarity. According to the AGSL, the diamond has a total depth of 61.3% with a 55.8% table diameter and a 34.9° crown angle which is offset by a pavilion angle of 40.7° with a thin to medium, faceted girdle and a pointed culet… it’s going to be howling at the moon every time it catches even the smallest glimpse of light!
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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