2ct Cushion (8×8×5.12 mm) vs 2ct Trillion (9×9×3.6 mm)
Diamond Size Comparison
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| 2 ct Cushion (8×8×5.12mm) | 2 ct Trillion (9×9×3.6mm) |
Cutting style
(modified) brilliant
Modified brilliant
Weight
2 ct
2 ct
Measurements
8×8×5.12 mm
9×9×3.6 mm
L/W ratio
1
1
Face-up size
Inadequate
Borderline
This diamond is a SPREAD CUT!
This diamond BARELY looks its weight!
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 2ct Cushion (8×8×5.12mm) and 2ct Trillion (9×9×3.6mm) 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.
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 2ct Cushion (8×8×5.12mm) and 2ct Trillion (9×9×3.6mm) 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.
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Ring width: 3.0 mm
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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.
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.
| 2ct Cushion (8×8×5.12mm) | |
| 2ct Trillion (9×9×3.6mm) | |
| Difference: 7.38mm² (15%) |
2 carat Cushion (8×8×5.12mm) has approx. 15% more face-up area than 2 carat Trillion (9×9×3.6mm).
To learn about the accuracy of these numbers, click here.
Quick Buying Guide
Diamond prices vary greatly as they depend on the combination of unique characteristics (4Cs - Cut, Color, Clarity, and Carat). For best value, it's important to choose the combination that will reduce the price without having a negative impact on appearance.
Each shape has its own recommended balance of qualities that will give you the most bang for your buck. Below is a quick buying guide to give you an idea, but for more detailed explanation, please see the complete buying guides for the respective diamonds (links below).
Each shape has its own recommended balance of qualities that will give you the most bang for your buck. Below is a quick buying guide to give you an idea, but for more detailed explanation, please see the complete buying guides for the respective diamonds (links below).
2ct Cushion (8×8×5.12mm)
2ct Trillion (9×9×3.6mm)
Min. clarity
SI1 or better
SI or better
Min. color (platinum setting)
H+
H+
Min. color (yellow gold setting)
J+
J+
Depth percentage
59 - 70%
32 - 48%
Table percentage
56 - 70%
50 - 70%
Length-to-width ratio
1.00 - 1.35
1.00 - 1.10
Min. polish/symmetry
Good or better
Good or better
Additional Info
2ct Cushion (8×8×5.12mm)
2ct Trillion (9×9×3.6mm)
Face-up size
Too large for 2 carat Cushion
A bit small for 2 carat Trillion
Facets
usually 58
Between 31 - 50
Length
8 mm
9 mm
Width
8 mm
9 mm
Depth
5.12 mm
3.6 mm
Gram weight
0.4 g (0.0141 ounces)
0.4 g (0.0141 ounces)
Points
200 pts
200 pts
Volume
113.64 mm³
113.64 mm³
Compare diamonds
Choose diamonds to compare:
Popular comparisons:
- 2ct Cushion (8x8x5.12) vs. 2ct Round (8.25x8.25x4.97)
- 2ct Cushion (8x8x5.12) vs. 1ct Princess (5.51x5.51x3.97)
- 2ct Cushion (8x8x5.12) vs. 1.8ct Cushion (7x7x4.48)
- 2ct Cushion (8x8x5.12) vs. 4ct Cushion (10x10x6.4)
- 2ct Cushion (8x8x5.12) vs. 1.5ct Cushion (7x7x4.48)
- 2ct Cushion (8x8x5.12) vs. 4ct Cushion (9.25x9.25x5.92)
- 2ct Cushion (8x8x5.12) vs. 2ct Emerald (8.42x6.24x4.06)
- 2ct Cushion (8x8x5.12) vs. 2ct Radiant (8x8x5.12)
- 2ct Cushion (8x8x5.12) vs. 3ct Oval (10x8x4.88)
Depth percentage for 2 carat Cushion (8×8×5.12mm)
Depth percentage of Cushion cut is the ratio of the total depth (measured from table to culet)
to its width. The total depth percentage of this diamond
is 64%, which is OK.
(Recommended depth percentage for Cushions is between 59% and
70%)
Depth percentage for cushions is calculated with the following formula:
Depth percentage for cushions is calculated with the following formula:
Depth % = (total depth ÷ width) × 100
2 carat
Cushion
(8×8×5.12mm) depth %:
Total depth: 5.12 mm
Width = 8 mm
Width = 8 mm
Depth % = (5.12 ÷ 8 ) × 100 = 64%
Depth percentage for 2 carat Trillion (9×9×3.6mm)
Depth percentage of Trillion cut is the ratio of the total depth (measured from table to culet)
to its width. The total depth percentage of this diamond
is 40%, which is OK.
(Recommended depth percentage for Trillions is between 32% and
48%)
Depth percentage for trillions is calculated with the following formula:
Depth percentage for trillions is calculated with the following formula:
Depth % = (total depth ÷ width) × 100
2 carat
Trillion
(9×9×3.6mm) depth %:
Total depth: 3.6 mm
Width = 9 mm
Width = 9 mm
Depth % = (3.6 ÷ 9 ) × 100 = 40%
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.
Diamonds that fall out of recommended depth range are generally less desirable and usually best to be avoided.
Face-up size evaluation for 2 carat Cushion (8×8×5.12mm)
The face-up size of this 2 carat Cushion
(8×8×5.12mm) is out of normal range for
2ct diamonds of this shape. Compared to 2
carat Cushion 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 instead of optimal light performance. If compared from above, it would look larger than a well cut 2ct Cushion. This is not a good thing. Spread cuts are typically too shallow, which allows light to leak out of the stone resulting in less light being reflected 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.
A spread cut is a diamond that is cut to maximize spread instead of optimal light performance. If compared from above, it would look larger than a well cut 2ct Cushion. This is not a good thing. Spread cuts are typically too shallow, which allows light to leak out of the stone resulting in less light being reflected 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.
2 carat Cushion reference diamond
Since there are no specific ideal proportions defined for Cushion cuts,
an estimation formula is used to calculate the Cushion reference diamond.
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Note: Cushion diamonds with face-up area of within 9% lower
and 12% higher than reference Cushion diamond area
are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Cushion cuts
is only an estimation (±5%). Due to uniqueness of each stone,
it's impossible to accurately calculate face-up area given only a diamond's measurements.
Face-up size evaluation for 2 carat Trillion (9×9×3.6mm)
The face-up size of this 2 carat Trillion
(9×9×3.6mm) is slightly out of normal range for
2ct diamonds of this shape. Compared to 2
carat Trillion reference diamond,
this diamond appears a bit too small when viewed from the top, which means it's
probably a borderline chubby.
A chubby is a diamond with hidden extra weight that looks smaller than it should when viewed from the top. Hidden weight is typically a result of a poor cut usually linked to oversized girdle, deeper pavilion, and/or steeper crown.
In order to maximize profits, diamond cutters tend to retain as much weight from the rough as possible. This practice, however, can have detrimental effects on the stone's face-up size and its optical qualities. Poorly proportioned stones look duller and sparkle less than well cut stones. Chubby stones also look smaller.
A chubby is a diamond with hidden extra weight that looks smaller than it should when viewed from the top. Hidden weight is typically a result of a poor cut usually linked to oversized girdle, deeper pavilion, and/or steeper crown.
In order to maximize profits, diamond cutters tend to retain as much weight from the rough as possible. This practice, however, can have detrimental effects on the stone's face-up size and its optical qualities. Poorly proportioned stones look duller and sparkle less than well cut stones. Chubby stones also look smaller.
The bottom line:
One should never sacrifice beauty for weight.
You probably don't want to pay for extra weight that doesn't add anything to the beauty.
You want a stone that looks its weight. Sizewise, this 2ct Trillion looks like a well cut 1.57ct Trillion.
2 carat Trillion reference diamond
Since there are no specific ideal proportions defined for Trillion cuts,
an estimation formula is used to calculate the Trillion reference diamond.
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Note: Trillion diamonds with face-up area of within 13% lower
and 16% higher than reference Trillion diamond area
are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Trillion cuts
is only an estimation (±9%). Due to uniqueness of each stone,
it's impossible to accurately calculate face-up area given only a diamond's measurements.
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 2ct Cushion (8×8×5.12mm):
Top surface area = 57.6 mm²
Weight = 2ct
Face-up area per carat = 57.6 ÷ 2 = 28.8mm²/ct
Weight = 2ct
Face-up area per carat = 57.6 ÷ 2 = 28.8mm²/ct
Face-up area per carat
for 2ct Trillion (9×9×3.6mm):
Top surface area = 50.22 mm²
Weight = 2ct
Face-up area per carat = 50.22 ÷ 2 = 25.11mm²/ct
Weight = 2ct
Face-up area per carat = 50.22 ÷ 2 = 25.11mm²/ct
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