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1.2 vs 1.3 round diamond

Renae Sims

Rough_Rock
Joined
Apr 19, 2021
Messages
10
I currently have a 1.3 round diamond with is very cloudy. Measurements are 7.10-7.14x4.28. I am looking at purchasing the following diamond that is 1.2 measurements 6.70-6.74x4.23. Will the 1.2 diamond with the measurements below look a lot smaller than the 1.3 diamond when mounted?


1.2 Diamond
1618865154272.png

1.3 Diamond
1618865380290.png
 

Txborn79

Shiny_Rock
Joined
Jan 8, 2019
Messages
290
I currently have a 1.3 round diamond with is very cloudy. Measurements are 7.10-7.14x4.28. I am looking at purchasing the following diamond that is 1.2 measurements 6.70-6.74x4.23. Will the 1.2 diamond with the measurements below look a lot smaller than the 1.3 diamond when mounted?


1.2 Diamond
1618865154272.png

1.3 Diamond
1618865380290.png

The 1.2 will look smaller than a well cut stone because it’s cut deep at 63%
 

sledge

Ideal_Rock
Premium
Joined
Apr 23, 2018
Messages
4,815
You have a unique situation here. You are wanting to upgrade your existing stone for something that is more clear and beautiful w/o sacrificing the size that you have come to love/need.

Consider the following in your evaluation & search for a replacement:

1. The diameter of the stone that we see from a face up position is called spread. A diamond's proportions can affect the spread and make a stone look large, average or small for its carat weight.

2. Your existing stone is large for its carat weight. This is a result of the proportions. The current stone has a large table, shallow depth & shallow crown. Consequently, the weight is pushed out in the horizontal plane creating a "fat", or larger than average, spread for a stone of 1.3 carats.

3. For reference, a stone of 1.3 carats that is ideally cut should measure around 7.00mm in spread. Below is a link for example purposes only. No suggestions to buy, etc. Just using to establish spread/size of a typical ideal cut MRB of this size.

https://www.briangavindiamonds.com/1.300-i-vs2-round-diamond-ags-104102020054

4. The stone you wish to purchase has a steeper than average crown and consequently steeper depth as well. The beauty & personality of this stone will be different from your existing stone, but the weight is also distributed differently. Because of the proportions, this stone is carrying extra weight in the vertical plane, and will consequently look smaller than average in it's spread.

5. For reference, a stone of 1.2 carat that is ideally cut should measure around 6.80mm in spread. Below is a link for example purposes only. No suggestions to buy, etc. Just using to establish spread/size of a typical ideal cut MRB of this size.

https://hpdiamonds.com/diamonds/54

6. To obtain an ideal cut stone with the same spread as your existing stone, here is one potential candidate. Again, not suggesting to purchase as I don't know your budget, color or clarity preferences. I am looking PURELY at size only. But this 1.368 carat measures nearly identical in spread to your existing stone.

https://www.briangavindiamonds.com/1.368-j-vs1-signature-round-ags-104110388014

7. The above said, most people can begin to detect a difference in spread around the 0.20mm. Sometimes less depending on a person's visual acuity. That is roughly 1/128th of an inch which is very minor, about the thickness of a couple sheets of paper.

8. The real question becomes what can you live with? I assume you are trying to balance budget with your size & beauty requirements. However, have you considered how having a complete firecracker with no clarity issues but just a smidge smaller may make your heart sing in a different way since you could thoroughly enjoy your diamond? If you want to share your budget & color preferences we can try to find you that stone that fits your requirements.
 

Txborn79

Shiny_Rock
Joined
Jan 8, 2019
Messages
290
I am looking at a 1.41 I VS2 diamond ( 7.20-7.21 x 4.44mm) I have included the GIA report picture. Would these measurements be considered an excellent cut?

1619047106367.png 1619047106367.png

This one could be good. It would help if you could get advanced images but if it’s a local jeweler, they most likely don’t have the tools. I would definitely pick this one over either of the first ones.
 

Renae Sims

Rough_Rock
Joined
Apr 19, 2021
Messages
10
My concern it is has "Knot" Listed in the Key To Symbol on the GIA report. I have attached the report. Should I be concerned about a Knot in the diamond.

1619050978936.png 1619050978936.png
 

Attachments

Renae Sims

Rough_Rock
Joined
Apr 19, 2021
Messages
10
This one could be good. It would help if you could get advanced images but if it’s a local jeweler, they most likely don’t have the tools. I would definitely pick this one over either of the first ones.

The GIA report list "Knot" as the 1st inclusion on the GIA report. Should I be concerned about a knot in the diamond or can it be covered with a prong?

 

ringo865

Ideal_Rock
Premium
Joined
Feb 14, 2014
Messages
2,589
The knot is on the pavillion, or the bottom side of the diamond, so no... a prong would not cover it. Not sure how detrimental a knot in a VS2 would be considered, but if it ever became dislodged, it would become a “cavity” and those can get filled with dirt, oil, lotion, gunk and make the stone appear dirty. Pretty small inclusion overall though.

I’ll let those more knowlegeable weigh in on this inclusion and the cut quality.
 

Txborn79

Shiny_Rock
Joined
Jan 8, 2019
Messages
290
The GIA report list "Knot" as the 1st inclusion on the GIA report. Should I be concerned about a knot in the diamond or can it be covered with a prong?


Since it’s a VS2 and the knot is in the pavilion, I don’t think it will be a problem. It can’t be hidden under a prong but could be protected by the side prong so that something can’t hit against it. What type of setting will it be set in?
 

lovedogs

Super_Ideal_Rock
Premium
Joined
Jul 31, 2014
Messages
12,977
I typically recommend avoiding knots, but this one seems like it's in a relatively "safe" location. The specs are promising.
 

Renae Sims

Rough_Rock
Joined
Apr 19, 2021
Messages
10
Since it’s a VS2 and the knot is in the pavilion, I don’t think it will be a problem. It can’t be hidden under a prong but could be protected by the side prong so that something can’t hit against it. What type of setting will it be set in?

A 4 prong setting
 

lovedogs

Super_Ideal_Rock
Premium
Joined
Jul 31, 2014
Messages
12,977
With the cut do you think this diamond will have a lot of fire and sparkle?

We can't be sure of that without seeing the stone (at least pics or videos), but the numbers are "safe", which is helpful.
 

diamondseeker2006

Super_Ideal_Rock
Premium
Joined
Jan 11, 2006
Messages
57,413
I'd keep looking and avoid a knot as the primary inclusion. That stone is definitely within better cut parameters than the first one, though.

Here are some ranges to help you narrow down the better cut GIA Ex cut stones, but we would at least need photos in addition to the report.

Table: 54-58

Depth: 60-62.3

Crown angle: 34-35.0 (or possibly up to 35.5 if the pavilion angle is 40.6)

Pavilion angle: 40.6-40.9
 

LoveMeDo

Shiny_Rock
Joined
Feb 2, 2006
Messages
211
The specs of this last stone look good - but can your jeweler confirm if the stone is eye clean since most of the inclusions seem to be in the center of the stone under the table?
 
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