shape
carat
color
clarity

Table size & the overall appearance of the diamond.

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

trichrome

Shiny_Rock
Joined
Dec 9, 2002
Messages
397
Let''s take a simple example.

A 1ct RB diamond well-cut with a 6.5mm diameter.
Let''s assume the table is 57%

6.5 mm of diameter = 132.7 sqmm
& the table is 75.6 sqmm

Now let''s take a well cut .85 ct with a 6.1 mm diameter
Let''s assume the table is 62%

6.0 mm of diameter = 116.9 sqmm
& the table is 72.5 sqmm or 96% the size of the 1ct'' table

So as you can see.... an 85 pointer can have a table that is almost if not bigger than the
table of a wellcut 1ct diamond.....if you can find such a diamond with good crown & pavilion
angles.....you got a kicker...!

Trichrome.
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
Trichrome,

I ran DiamCalc evaluation for diamonds with 56% and 62% tables (crown and pavilion angles are 34.5* and 40.75* correspondingly).

Diamond with 56% table has contrast = 0.99 (1.0 corresponds to theoretical Tolkowsky cut) while diamond with 62% table has contrast = 0.88.

Contrast affects human peception of brilliance.
 

trichrome

Shiny_Rock
Joined
Dec 9, 2002
Messages
397
Leonid,

I agree.. However, a larger table means also a bigger flash of white light...this also
affects brillancy of the stone... I guess it's a matter of taste.

Trichrome
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
----------------
I agree.. However, a larger table means also a bigger flash of white light...this also
affects brillancy of the stone... I guess it's a matter of taste.

Trichrome
----------------
Agreed
1.gif
 
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 Get 3 HCA Results
    Throwback Thursdays for June 2022
    Throwback Thursdays for June 2022 - 06/29
    Jewels Of The Week: June 2022
    Jewels Of The Week: June 2022 - 06/24
    Natural Diamond Prices - June 2022
    Natural Diamond Prices - June 2022 - 06/21
Top