Find your diamond
Find your jewelry
shape
carat
color
clarity

Question for Mr. Holloway - change 0.4 degrees and grades drop from ex to gd

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

guy57

Rough_Rock
Joined
May 26, 2001
Messages
8
Mr. Holloway,Here's a stone that I'm looking at:GIA cert
round brilliant cut
E color
VS2 clarity (light feathers on the peripheral)
1.58ct
56% table
61.8% depth
35.8 degrees crown angle
40.4 degrees pavillon angle
very good symmetry and polish I used the HCA and got 0.9. The ratings are ex-ex-ex-vg.However, I tried to play with the angles a little and found that if I use a pavillon angle of 40.8 degrees, the total score becomes 3.9 and ratings are gd-gd-gd-vg. Can you help me understand why such a small change in the pavillon angle (0.4 degrees) would change so much? Further, I understand that the Sarin report gives only averages, what should I do to ensure that the stone behaves more like 0.9 stone and not a 3.9 stone?Thanks for your help!
 

guy57

Rough_Rock
Joined
May 26, 2001
Messages
8
Thanks for replying!Enjoy Italy! If you get a chance, don't miss Cinque Terre, by La Spezia.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Guy57,Garry is traveling now and I'm not sure that he will be able to answer your question soon.I tried answering myself though in the other thread...
 
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!
    Diamond Jewelry For 4th Of July Quarantine Celebrations
    Diamond Jewelry For 4th Of July Quarantine Celebrations
    Fancy Greyish Yellowish Green Diamond
    Fancy Greyish Yellowish Green Diamond
    Phenomenal 3.01ct Cushion Brilliant Cut Engagement Ring
    Phenomenal 3.01ct Cushion Brilliant Cut Engagement Ring

Need Something Special?

Get a quote from multiple trusted and vetted jewelers.

Holloway Cut Advisor



Diamond Eye Candy

Click to view full-size image.

New posts

Top