1.9ct Trillion (9.55×8.24×3.92) vs 1.18ct Trillion (8.3×9.38×3.15)
Diamond size comparison
Actual size is set for screen
Change
sample image
|
vs. |
sample image
|
|||||||||
| 1.9 ct Trillion (9.55×8.24×3.92mm) | 1.18 ct Trillion (8.3×9.38×3.15mm) |
Cutting style
Modified brilliant
Modified brilliant
Weight
1.9 ct
1.18 ct
Measurements
9.55×8.24×3.92 mm
8.3×9.38×3.15 mm
L/W ratio
1.16
1.13
Face-up size
Borderline
Borderline
This diamond BARELY looks its weight!
This diamond is borderline SPREAD CUT!
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 1.9ct Trillion (9.55×8.24×3.92mm) and 1.18ct Trillion (8.3×9.38×3.15mm) 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.
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 1.9ct Trillion (9.55×8.24×3.92mm) and 1.18ct Trillion (8.3×9.38×3.15mm) 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.
Settings
|
Ring:
Skin tone:
Ring width: 3.0 mm
Saved...
|
|
64 mm |
|
|
||||||||||||||||
|
||||||||||||||||||||
|
|
|
||||||||||||||||||
Actual size is set for screen
Change
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.
| 1.9ct Trillion (9.55×8.24×3.92mm) | |
| 1.18ct Trillion (8.3×9.38×3.15mm) | |
| Difference: 0.52mm² (1%) |
1.9 carat Trillion (9.55×8.24×3.92mm) has approx. 1% more face-up area than 1.18 carat Trillion (8.3×9.38×3.15mm).
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).
1.9ct Trillion (9.55×8.24×3.92mm)
1.18ct Trillion (8.3×9.38×3.15mm)
Min. clarity
SI or better
SI or better
Min. color (platinum setting)
H+
H+
Min. color (yellow gold setting)
J+
J+
Depth percentage
32 - 48%
32 - 48%
Table percentage
50 - 70%
50 - 70%
Length-to-width ratio
1.00 - 1.10
1.00 - 1.10
Min. polish/symmetry
Good or better
Good or better
Additional Info
1.9ct Trillion (9.55×8.24×3.92mm)
1.18ct Trillion (8.3×9.38×3.15mm)
Face-up size
A bit small for 1.9 carat Trillion
A bit large for 1.18 carat Trillion
Facets
Between 31 - 50
Between 31 - 50
Length
9.55 mm
8.3 mm
Width
8.24 mm
9.38 mm
Depth
3.92 mm
3.15 mm
Gram weight
0.38 g (0.0134 ounces)
0.24 g (0.0083 ounces)
Points
190 pts
118 pts
Volume
107.95 mm³
67.05 mm³
Compare diamonds
Choose diamonds to compare:
Popular comparisons:
- 1.9ct Trillion (9.55x8.24x3.92) vs. 1.3ct Oval (8.87x5.91x3.61)
- 1.9ct Trillion (9.58x9.58x3.83) vs. 2ct Trillion (9.75x9.75x3.9)
- 1.9ct Trillion (9.58x9.58x3.83) vs. 2.37ct Trillion (10.31x10.31x4.12)
- 1.95ct Trillion (9.31x8.96x4.37) vs. 2.2ct Trillion (9.3x9.84x4.35)
- 1.89ct Trillion (8.89x8.98x4.39) vs. 2.32ct Emerald (8.85x6.4x4.16)
- 1.82ct Trillion (9.45x9.45x3.78) vs. 3.7ct Round (10.05x10.05x6.06)
- 1.98ct Trillion (9.18x9.13x4.37) vs. 2.08ct Trillion (9.29x9.22x4.52)
- 1.98ct Trillion (9.05x8.98x4.51) vs. 1.9ct Round (8.05x8.05x4.85)
- 1.85ct Trillion (9.5x9.5x3.8) vs. 1.85ct Round (7.98x7.98x4.81)
Depth percentage for 1.9 carat Trillion (9.55×8.24×3.92mm)
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 47.6%, 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
1.9 carat
Trillion
(9.55×8.24×3.92mm) depth %:
Total depth: 3.92 mm
Width = 8.24 mm
Width = 8.24 mm
Depth % = (3.92 ÷ 8.24 ) × 100 = 47.6%
Depth percentage for 1.18 carat Trillion (8.3×9.38×3.15mm)
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 38%, 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
1.18 carat
Trillion
(8.3×9.38×3.15mm) depth %:
Total depth: 3.15 mm
Width = 9.38 mm
Width = 9.38 mm
Depth % = (3.15 ÷ 9.38 ) × 100 = 38%
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 1.9 carat Trillion (9.55×8.24×3.92mm)
The face-up size of this 1.9 carat Trillion
(9.55×8.24×3.92mm) is slightly out of normal range for
1.9ct diamonds of this shape. Compared to 1.9
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 1.9ct Trillion looks like a well cut 1.51ct Trillion.
1.9 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.
|
|
|||||||||||||||||||
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.
To learn more about diamond size evaluation, click here.
Face-up size evaluation for 1.18 carat Trillion (8.3×9.38×3.15mm)
The face-up size of this 1.18 carat Trillion
(8.3×9.38×3.15mm) is slightly out of normal range for
1.18ct diamonds of this shape. Compared to 1.18
carat Trillion reference diamond, this diamond seems a bit too large
when viewed from the top. This could be indicative of a spread cut, which is not a good sign.
A spread cut is a diamond that is cut to maximize spread. In this case, it would look larger than a well cut 1.18 carat Trillion when viewed from the top, however, this is usually 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 can 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. In this case, it would look larger than a well cut 1.18 carat Trillion when viewed from the top, however, this is usually 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 can 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:
This diamond could be a spread cut. Caution is advised, since spread cuts
usually lack the sparkle and perfection that is expected of a beautiful diamond.
1.18 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.
|
|
|||||||||||||||||||
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.
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 1.9ct Trillion (9.55×8.24×3.92mm):
Top surface area = 48.79 mm²
Weight = 1.9ct
Face-up area per carat = 48.79 ÷ 1.9 = 25.68mm²/ct
Weight = 1.9ct
Face-up area per carat = 48.79 ÷ 1.9 = 25.68mm²/ct
Face-up area per carat
for 1.18ct Trillion (8.3×9.38×3.15mm):
Top surface area = 48.27 mm²
Weight = 1.18ct
Face-up area per carat = 48.27 ÷ 1.18 = 40.91mm²/ct
Weight = 1.18ct
Face-up area per carat = 48.27 ÷ 1.18 = 40.91mm²/ct
Enter your screen size (diagonal)
My screen size is
inches
Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a diamond, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a diamond, ring and finger will not be shown correctly.