Find your diamond
Find your jewelry
shape
carat
color
clarity

2 different HCA scores for the same stone?

Status
Not open for further replies. Please create a new topic or request for this thread to be opened.

JayTee

Rough_Rock
Joined
Dec 6, 2002
Messages
62
Stone in question:
1.31 D VS2
Depth 61.4%
Table 56.0%
girdle thin to med
Ex-Ex

For the additional information, I was sent an Ogi report which had the following numbers (I'm typing them exactly as they appeared on the doc, maybe someone can explain?):
crown angle 35.4 (35.1 - 35.7)
crown % 15.7 (15.4-15.9
pavilion angle 41.0 (40.6-43.6)
pavilion % 43.3 (42.7-43.6)

So if I type all these numbers into the HCA using crown/pavilion angle, I get:
vg-vg-vg-vg 2.9

If I use crown/pavilion % instead I get:
x-x-vg-vg 1.5

Is there any particular reason why there is such a discrepancy in the HCA scores? I understand that I shouldn't rely on it too much, but since this stone is an online one, I'm trying to gather all the information I can in order to make an informed decision. Thanks.
 

StevL

Brilliant_Rock
Trade
Joined
Dec 31, 1999
Messages
598
I beleive Garry has stated before that angles are much more accurate than percentages.

I'll defer to Garry or Leonid to explain.
 
Status
Not open for further replies. Please create a new topic or request for this thread to be opened.
Be a part of the community It's free, join today!
    Our Favorite Jewels from the 2021 Golden Globes
    Our Favorite Jewels from the 2021 Golden Globes
    Paris Hilton is Engaged
    Paris Hilton is Engaged
    Diamonds and Jewelry - Recommended Reads, Part 2
    Diamonds and Jewelry - Recommended Reads, Part 2

Need Something Special?

Get a quote from multiple trusted and vetted jewelers.

Holloway Cut Advisor



Diamond Eye Candy

Click to view full-size image.
Top