Diamond color grading..

[Amys Bling]

Why does diamond color grading go from D-Z and not A-Z??

 

[kenny]

[URL='https://www.pricescope.com/community/threads/why-does-diamond-color-start-with-d-why-not-a.24129/']https://www.pricescope.com/community/threads/why-does-diamond-color-start-with-d-why-not-a.24129/[/URL]

 

[Amys Bling]

https://www.pricescope.com/community/threads/why-does-diamond-color-start-with-d-why-not-a.24129/

Thanks Kenny- you are a whiz with the search feature!

 

[kenny]

https://www.pricescope.com/community/threads/why-does-diamond-color-start-with-d-why-not-a.24129/

Thanks Kenny- you are a whiz with the search feature!

I must confess.
Actually I'm not.
I just googled your question and DF's thread came right up.
Of course John Pollard knew the answer.

 

[Amys Bling]

https://www.pricescope.com/community/threads/why-does-diamond-color-start-with-d-why-not-a.24129/

Thanks Kenny- you are a whiz with the search feature!

I must confess.
Actually I'm not.
I just googled your question and DF's thread came right up.
Of course John Pollard knew the answer.

ahh, the secret to your success....

 

[texaskj]

When he's not coordinating outfits with Jonathan W.!

 

[AmeliaG]

Interesting thread. Thanks, Kenny. I thought I read somewhere that D was chosen to allow the possibility for even more colorless diamonds to be found at some point in the future. So, for example, if a stone was unearthed that was far whiter than any current D, there would be an available letter for it.

Incidentally, is diamond color still graded by the human eye? I think I saw a 'colorimeter'? used for grading diamond color. That would take human error out of the equation.