Opinion on a Very Good cut round diamond

[alzuniga]

Hello, I've been lurking on this website and finally decided to make my first post. To all the jewelers/gemologist out there, what is your opinion on this diamond:


Measurements 7.56 - 7.63 x 4.57 mm
Carat Weight 1.61 carat
Color Grade G
Clarity Grade SI1
Cut Grade Very Good

PROPORTIONS:

Depth 60.2 %
Table 57 %
Crown Angle 34.5°
Crown Height 15.0%
Pavilion Angle 40.2°
Pavilion Depth 42.5%
Star Length 45%
Lower Half 75%
Girdle Thin to Medium, Faceted, 3.0%
Culet None

Thanks

 

[ecf8503]

Scores well on the HCA, actually (1.0). Can you get an idealscope image?

 

[Rhino]

An ideal scope on that diamond is going to show solid or virtually solid red which many layman would look at and say GREAT! Truth is a diamond like this is going to produce a lot of head/body shadow in diffuse and/or natural daylighting and would take a hit in brightness & contrast or what GIA would term "patterned scintillation". To it's credit it would likely be fiery though in spot lighting.

 

[chrono]

I'm sure this topic has been done to death before but Jon, can you please explain how you came to this conclusion (without getting overly technical)?

 

[Texas Leaguer]

The pavilion angle is a little low. Increasing it to 40.6 would put it into the GIA Ex range. This is a case where the assumptions behind the HCA tool differ from both GIA and AGS in terms of what makes a top cut.

 

[alzuniga]

Thank you everyone for your response and expertise! Much appreciated. Jon, I've watched your videos online and really appreciate your expertise! Texan Leaguer mentioned something I had noticed-a pavilion angle of 40.6 would put this diamond in the Excellent Cut category. All of the other specs for this diamond fall under excellent cut, however, because it has a pavilion angle of 40.2, it's considered a Very Good cut. Does a 0.4 difference in pavilion angle make a huge difference in terms of visual optics?


I should add that I've already purchased this diamond months ago. I cant help but second guess this diamond because it has been labeled Very Good rather than Excellent. It certainly is eye clean but I cant say its mind clean. I"m looking to get some reassurance that I didnt buy a crappy diamond. I wish I would have found this website sooner!