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Holloway Cut Adviser

Discussion in 'RockyTalky' started by D.V.M., Sep 12, 2002.

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  1. D.V.M.
    Rough_Rock

    Messages:
    4
    Joined:
    Sep 9, 2002
    by D.V.M. » Sep 12, 2002
    What does a 2.2 score mean.

    The stone I have is rated an Ideal but the advisor does not agree.
    I see that the stones stats fall within the Tolkowsky Ideal stats.
    62.6 Depth
    57.9 Table
    14.9 Crown
    43.6 Pavillion

    It is a 1.83 VS1 H Color, no Flor.

    I paid under 10,000 for it before I discovered the HCA.
    Was this a good price?
     
  2. pricescope
    Ideal_Rock

    Messages:
    8,266
    Joined:
    Dec 31, 1999
    by pricescope » Sep 12, 2002
    Tolkowsky specified a single set of proportions:

    53% table size
    34.5° crown angle
    40.75° pavilion angle
    Knife edge girdle.

    Some people are using "Tolkowsky" term rather freely.

    Nonetheless, there are many combinations of crown and pavilion angles other than Tolkowsky that produce excellent results. However, 43.6% pavilion depth is rather deep and the stone is not ideal cut.

    Can you also post the measurements for your stone?
     
  3. Garry H (Cut Nut)
    Super_Ideal_Rock
    Trade

    Messages:
    13,875
    Joined:
    Aug 15, 2000
    by Garry H (Cut Nut) » Sep 12, 2002
    This image (if it worked) show what your diamond would look like with the proportions you posted through an ideal-scope. The white area inside the table would appear a little dull and lifleless because the diamond is 1/2 a degree deeper and steeper than Tolkowsky suggested. Recently we have discovered that Tolkowsky's maths predict a shallower rather than deeper combination of crown and pavilion angles.
    http://www.folds.net/diamond/index.html
    check this out if you wnt to know more :)

    The good news is that at 1.83ct if you ever want to recut it you will loose only a few points and sttill have a 1 and 3/4ct.

    HCART.jpg
     
  4. D.V.M.
    Rough_Rock

    Messages:
    4
    Joined:
    Sep 9, 2002
    by D.V.M. » Sep 12, 2002
    The measurements of the stone are:

    7.85 x 7.77 x 4.89

    What do you think on the value of the stone?
     
  5. pricescope
    Ideal_Rock

    Messages:
    8,266
    Joined:
    Dec 31, 1999
    by pricescope » Sep 12, 2002
    1.83 crt diamond with 58% table, 34.50° crown and 40.75° pavilion angles should have 8.01 mm in diameter, not 7.81 mm as this one.

    I just wanted to demonstrate that deep cut stone looks smaller for its carat weight.

    Try to do a search from Pricescope.com front page for the same carat-color-clarity to figure out a price range for the similar diamonds
     
  6. fire&ice
    Ideal_Rock

    Messages:
    7,828
    Joined:
    Jul 22, 2002
    by fire&ice » Sep 12, 2002
    O.K....this conversation is up my alley today.

    Finally retrived my cert. Just plugged it into your HCA. No surprises as I have always known the cut to be very good/good and not ideal - the price reflecting such. Score 2.4 - w/very good in all your categories. Also, I know the measurements are smaller - but it's plenty big on my little hands!

    3.01
    d - 62.1
    t - 59
    crown - 14.4%
    Pav - 43.5%

    measurements 9.24 - 9.19 x 5.72
    Girdle is med-th
    cutlet - none
    polish - good
    symmetry - very good
    I (("per jeweler" good I - closer to H)
    SI1 ("" closer to SI2)
    med blue fluor ("" closer to strong)

    Stone is set w/ 3 stone (baguette) vatche ring.

    I bought one of your ideal-scopes from Dave (although my husband is refering to it as the "cool" thingamajig). The above pic does not look like my diamond. I wonder how much the setting allows light in the pav. - those Vatches are pretty hefty and tight and is that showing me something different than if the stone is unset- I see hot pinks in the table. The look is more similair to the FIC pic. The "radiants" of the stars extend all the way to the end of the stone and are quite pronounced.

    I guess my question is "how does the setting effect what the ideal scope reads. I had great fun looking at my diamond bracelet in the scope - playing a guessing game as I went from stone to stone - trying to predict what I would see - each stone is about .20-.25c. To add even more to the fun confusion - I prefered a stone that looked closer to what my 3c looks like next to one w/ significantly more hot pink. But, I have to say - the ones w/ considerably less pink were rather flat and lifeless looking.

    I do not have a trained diamond eye - but my stone has tons of sparkeles. Does the flour have an effect on that and the fact that the sym. is very good have an effect on the sparkle. Or, is it just that my untrained eye can't tell a difference?

    And last question, I have a friend who is getting ready to purchase two pears - will the ideal scope work for that shape?

    Sorry to be so wordy - just enjoying all this. :appl:
     
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