Diamond Measurement for 0.75Ct

[sleepymom]

Hey there,

I'm looking to get a 0.75ct diamond to replace my existing 0.33ct center stone. What would be the best measurement for a good vs. ideal cut diamond. I would like to know the difference between these to because I have the opportunity to purchase a good cut but want to make sure the measurements are accurate and what the real difference is between the two.
Thanks

What would a 5.6 x 5.8mm round brilliant diamond (.75ct) look like? Do these measurements sound accurate I don't have a depth yet!

 

[motcs]

Those numbers are the "length" and "width" of the diamond (basically the measurements of 2 perpendicular diameters) -- so the only thing that they tell you is how round the diamond might be. You'll need additional information to assess the cut of the diamond. One good place to start learning about cuts is from the tutorial on this site as well as the one on the GOG (www.goodoldgold.com) website.

 

[pqcollectibles]

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On 7/25/2004 12:19:00 AM sleepymom wrote:

Hey there,

I'm looking to get a 0.75ct diamond to replace my existing 0.33ct center stone. What would be the best measurement for a good vs. ideal cut diamond. I would like to know the difference between these to because I have the opportunity to purchase a good cut but want to make sure the measurements are accurate and what the real difference is between the two.
Thanks

What would a 5.6 x 5.8mm round brilliant diamond (.75ct) look like? Do these measurements sound accurate I don't have a depth yet!----------------

With rounds, you want the L and W measurements to be closer than 0.2mm. Usually those numbers are within about 0.05mm of each other. If the numbers you gave are the L and W measurments of a 0.75 carat round, I'd tend to think the diamond would look out of round.

Generally, the diameter of better cut, 0.75 carat rounds runs around 5.8 to nearly 6.0mm. I did a quick check of current PS listings and the better cuts had diameters ranging from around 5.85mm to around 5.95mm. Some can be as low as 5.7mm, but those diamonds tend to have thicker girdles. A thick girdle is weight that you pay for but don't see in the visual appearance of the diamond.

Here's a link to the Cut Charts in the Tutorial:

http://diamonds.pricescope.com/round.asp

You can also gather info from Vendors and use the DIY Cut Grading System at www.gemappraisers.com.

 

[DevilsAdvocate]

Hi Melody,

Congratulation on upgrading your diamond.

My advice is to focus on where you buy. A good gemologist, in a reliable store, can help you with the dozens of grading details.

Don't overlook brilliance, fire, sparkle, etc. How the diamond works with light is what makes it beautiful, even moreso than minor proportion differences. An Ideal Cut does not insure you get the best value. A well cut diamond can be just as pretty, maybe even better looking.

Some grading labs like the American Gem Society and Accredited Gem Appraisers offer reports that actually put a grade on the Cut. Other lab reports only offer partial information and do not currently put it ito a relevant grade.

It does not hurt to be sure you can return the diamond in a reasonable amount of time. That way you can have it checked by an accredited appraiser. It is well worth the extra dollars and you can get a proper document for your insurance also.