3.2 Carat Emerald (10×8.8×5.5mm) vs. 4 Carat Emerald (11×9×6mm)

Diamond comparison

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Actual size of 3.2ct Emerald diamond
Actual size
sample image
vs.
Actual size of 4ct Emerald diamond
Actual size
sample image
3.2 ct Emerald (10×8.8×5.5mm) 4 ct Emerald (11×9×6mm)
Cutting style
Step cut
Step cut
Weight
3.2 ct
4 ct
Measurements
10×8.8×5.5 mm
11×9×6 mm
Total depth
62.5% OK
66.7% OK
L/W ratio
1.14
1.22
Face-up size
Inadequate
Inadequate
 
This diamond is a SPREAD CUT!
This diamond is a SPREAD CUT!
Actual diamond size
Actual diamond size
Before purchasing a diamond, one should make sure it looks its weight. It's important to understand that carat weight does not equal face-up size.

Two diamonds of exactly the same weight (and shape) can vary quite considerably in face-up size. This depends on the proportions of the cut (e.g., deep cuts will face up smaller).

Here you can see the actual sizes of 3.2ct Emerald (10×8.8×5.5mm) and 4ct Emerald (11×9×6mm) as they would appear on a ring and finger.

Adjust the ring and finger size to get an idea of how these stones would look on your finger. To choose different diamonds or to change diamond parameters click here.

Compare prices and availability from recommended online vendors:


Settings
Ring: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on a left finger
3.2ct Emerald on a left ring
64 mm
Right finger image
Ring on a right finger
4ct Emerald on a right ring
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
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Ring diameter: 16.9 mm
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3.2ct Emerald side view Side view of ring
vs
4ct Emerald side view Side view of ring
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Face-up area
83.6 mm²  (±4%)
94.05 mm²  (±4%)
Face-up area is a measure of the size of the diamond when viewed from the top (as set in a ring).

It tells you how big the diamond is at the girdle plane. It's important for a diamond to have sufficient face-up size for its carat weight.
Face-up size outline
Face-up size outline
3.2ct Emerald (10×8.8×5.5mm)
4ct Emerald (11×9×6mm)
Difference: 10.45mm² (13%)
4 carat Emerald (11×9×6mm) has approx. 13% more top surface area than 3.2 carat Emerald (10×8.8×5.5mm).
Face-up area per carat
26.13 mm²/ct
23.51 mm²/ct
To learn about the accuracy of these numbers, click here.

Quick Buying Guide

3.2ct Emerald (10×8.8×5.5mm)
4ct Emerald (11×9×6mm)
Min. clarity
VS or better
VS or better
Min. color (platinum solitaire)
H+
H+
Depth percentage
60 - 69%
60 - 69%
Table percentage
58 - 69%
58 - 69%
Length-to-width ratio
1.25 - 1.65
1.25 - 1.65
Min. polish/symmetry
Good or better
Good or better
 Detailed buying guide

Additional Info

3.2ct Emerald (10×8.8×5.5mm)
4ct Emerald (11×9×6mm)
Face-up size
Too large for 3.2 carat Emerald
Too large for 4 carat Emerald
Facets
usually 58
usually 58
Length
10 mm
11 mm
Width
8.8 mm
9 mm
Depth
5.5 mm
6 mm
Gram weight
0.64 g (0.0226 ounces)
0.8 g (0.0282 ounces)
Points
320 pts
400 pts
Volume
181.82 mm³
227.27 mm³


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Depth percentage for 3.2 carat Emerald (10×8.8×5.5mm)

Depth percentage of Emerald cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 62.5%, which is OK. (Recommended depth percentage for Emeralds is between 60% and 69%)

Depth percentage for emeralds is calculated with the following formula:
Depth % = (total depth ÷ width) × 100

3.2 carat Emerald (10×8.8×5.5mm) depth %:
Total depth: 5.5 mm
Width = 8.8 mm
Depth % = (5.5 ÷ 8.8 ) × 100 = 62.5%

Depth percentage for 4 carat Emerald (11×9×6mm)

Depth percentage of Emerald cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 66.7%, which is OK. (Recommended depth percentage for Emeralds is between 60% and 69%)

Depth percentage for emeralds is calculated with the following formula:
Depth % = (total depth ÷ width) × 100

4 carat Emerald (11×9×6mm) depth %:
Total depth: 6 mm
Width = 9 mm
Depth % = (6 ÷ 9 ) × 100 = 66.7%

About Depth Percentage
Depth percentage is one of the most important measurements as it plays a critical role in diamond's appearance. If a diamond is cut too deep or too shallow, light leaks out, making the stone less brilliant and fiery. Deep cuts also add hidden weight.

Diamonds that fall out of recommended depth range are generally less desirable and usually best to be avoided.


Face-up size evaluation for 3.2 carat Emerald (10×8.8×5.5mm)

The face-up size of this 3.2 carat Emerald (10×8.8×5.5mm) is out of normal range for 3.2ct diamonds of this shape. Compared to 3.2 carat Emerald reference diamond, this diamond appears too big when viewed from the top. You might think that's a good thing, however, it's not. This is a so called spread cut.

A spread cut is a diamond that is cut to maximize spread. It looks larger than a well-cut 3.2ct Emerald when viewed from the top, however, this is not a good thing. Spread cuts are typically too shallow, which allows light to leak out of the stone instead of being properly returned back to the viewer's eye.

Spread cuts usually look lifeless and flat, and can sometimes exhibit a fish-eye effect. They may also come with an extremely thin girdle which can easily chip.

The bottom line: Spread cuts generally lack the brilliance and perfection that is expected of a beautiful diamond. Don't be fooled into thinking that you're getting a larger diamond for the money. This could be a rather flat, boring stone.

3.2 carat Emerald reference diamond

Since there are no specific ideal proportions defined for Emerald cuts, an estimation formula is used to calculate the Emerald reference diamond.
Parameters:
Weight: 3.2ct
Depth: 65%
L/W ratio: 1.35
 
Calculated values:
Length: 10 mm
Width: 7.41 mm
Depth: 4.82 mm
*Est. face-up area: 70.4 mm²
Note: Emerald diamonds with face-up area of within 9% lower and 12% higher than reference Emerald diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Emerald cuts is only an estimation (±4%). Due to uniqueness of each stone, it's impossible to accurately calculate face-up area given only a diamond's measurements.
To learn more about diamond size evaluation, click here.


Face-up size evaluation for 4 carat Emerald (11×9×6mm)

The face-up size of this 4 carat Emerald (11×9×6mm) is out of normal range for 4ct diamonds of this shape. Compared to 4 carat Emerald reference diamond, this diamond appears too big when viewed from the top. You might think that's a good thing, however, it's not. This is a so called spread cut.

A spread cut is a diamond that is cut to maximize spread. It looks larger than a well-cut 4ct Emerald when viewed from the top, however, this is not a good thing. Spread cuts are typically too shallow, which allows light to leak out of the stone instead of being properly returned back to the viewer's eye.

Spread cuts usually look lifeless and flat, and can sometimes exhibit a fish-eye effect. They may also come with an extremely thin girdle which can easily chip.

The bottom line: Spread cuts generally lack the brilliance and perfection that is expected of a beautiful diamond. Don't be fooled into thinking that you're getting a larger diamond for the money. This could be a rather flat, boring stone.

4 carat Emerald reference diamond

Since there are no specific ideal proportions defined for Emerald cuts, an estimation formula is used to calculate the Emerald reference diamond.
Parameters:
Weight: 4ct
Depth: 65%
L/W ratio: 1.35
 
Calculated values:
Length: 10.71 mm
Width: 7.93 mm
Depth: 5.15 mm
*Est. face-up area: 80.68 mm²
Note: Emerald diamonds with face-up area of within 9% lower and 12% higher than reference Emerald diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Emerald cuts is only an estimation (±4%). Due to uniqueness of each stone, it's impossible to accurately calculate face-up area given only a diamond's measurements.
To learn more about diamond size evaluation, click here.


Face-up Area per Carat

Face-up area per carat is calculated by dividing face-up area of the diamond with its carat weight. It tells you how many square millimeters of the top surface area a diamond is showing or would show for 1 carat weight. This can be useful when comparing stones of similar weights as it tells you how much spread per carat you will get.

Note: Face-up size does not linearly grow with carat weight, which means the heavier the stone, the smaller its face-up area per carat (e.g., 1ct stone will have higher face-up area per carat than 2ct stone).

Face-up area per carat for 3.2ct Emerald (10×8.8×5.5mm):
Top surface area = 83.6 mm²
Weight = 3.2ct

Face-up area per carat = 83.6 ÷ 3.2 = 26.13mm²/ct

Face-up area per carat for 4ct Emerald (11×9×6mm):
Top surface area = 94.05 mm²
Weight = 4ct

Face-up area per carat = 94.05 ÷ 4 = 23.51mm²/ct

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