1.25ct Marquise (11.18×5.59×3.41) vs 1.5ct Marquise (11.18×5.59×3.41)

Diamond size comparison

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Actual size of 1.25ct Marquise diamond
Actual size
sample image
vs.
Actual size of 1.5ct Marquise diamond
Actual size
sample image
1.25 ct Marquise (11.18×5.59×3.41mm) 1.5 ct Marquise (11.18×5.59×3.41mm)
Cutting style
Modified brilliant
Modified brilliant
Weight
1.25 ct
1.5 ct
Measurements
11.18×5.59×3.41 mm
11.18×5.59×3.41 mm
Total depth
61% OK
61% OK
L/W ratio
2
2
Face-up size
Adequate
Borderline
 
This diamond LOOKS its weight!
This diamond BARELY looks its weight!
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 1.25ct Marquise (11.18×5.59×3.41mm) and 1.5ct Marquise (11.18×5.59×3.41mm) 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
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Left finger image
Ring on a left finger
1.25ct Marquise on a left ring
64 mm
Right finger image
Ring on a right finger
1.5ct Marquise 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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1.25ct Marquise side view Side view of ring
vs
1.5ct Marquise side view Side view of ring
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Face-up area
44.37 mm²  (±4%)
44.37 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
1.25ct Marquise (11.18×5.59×3.41mm)
1.5ct Marquise (11.18×5.59×3.41mm)
Difference: 0mm² (0%)
1.25 carat Marquise (11.18×5.59×3.41mm) and 1.5 carat Marquise (11.18×5.59×3.41mm) have the same crown area.
Face-up area per carat
35.5 mm²/ct
29.58 mm²/ct
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).
1.25ct Marquise (11.18×5.59×3.41mm)
1.5ct Marquise (11.18×5.59×3.41mm)
Price (best value)
Min. clarity
SI or better
SI or better
Min. color (platinum setting)
H+
H+
Min. color (yellow gold setting)
J+
J+
Depth percentage
59 - 65%
59 - 65%
Table percentage
53 - 65%
53 - 65%
Length-to-width ratio
1.60 - 2.25
1.60 - 2.25
Min. polish/symmetry
Good or better
Good or better
 Detailed buying guide

Additional Info

1.25ct Marquise (11.18×5.59×3.41mm)
1.5ct Marquise (11.18×5.59×3.41mm)
Face-up size
Normal for 1.25 carat Marquise
A bit small for 1.5 carat Marquise
Facets
usually 58
usually 58
Length
11.18 mm
11.18 mm
Width
5.59 mm
5.59 mm
Depth
3.41 mm
3.41 mm
Gram weight
0.25 g (0.0088 ounces)
0.3 g (0.0106 ounces)
Points
125 pts
150 pts
Volume
71.02 mm³
85.23 mm³


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Depth percentage for 1.25 carat Marquise (11.18×5.59×3.41mm)

Depth percentage of Marquise cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 61%, which is OK. (Recommended depth percentage for Marquises is between 59% and 65%)

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

1.25 carat Marquise (11.18×5.59×3.41mm) depth %:
Total depth: 3.41 mm
Width = 5.59 mm
Depth % = (3.41 ÷ 5.59 ) × 100 = 61%

Depth percentage for 1.5 carat Marquise (11.18×5.59×3.41mm)

Depth percentage of Marquise cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 61%, which is OK. (Recommended depth percentage for Marquises is between 59% and 65%)

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

1.5 carat Marquise (11.18×5.59×3.41mm) depth %:
Total depth: 3.41 mm
Width = 5.59 mm
Depth % = (3.41 ÷ 5.59 ) × 100 = 61%

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 1.25 carat Marquise (11.18×5.59×3.41mm)

The face-up size of this 1.25 carat Marquise (11.18×5.59×3.41mm) is within the normal range for 1.25ct diamonds of this shape. Compared to 1.25ct Marquise reference diamond (see below), this diamond is of adequate size when viewed from the top. In short, all is OK, this diamond looks its weight.

The importance of face-up size
Diamonds are sold by weight (carats), but it's important to understand that weight doesn't equally translate into physical size, especially spread. Two diamonds of the same carat weight can vary greatly in spread, meaning that one diamond can appear larger than the other, even though they weight exactly the same.

Proper face-up size should play an important role when buying a diamond. When a diamond is set in a ring, your eyes will only see the face-up area, so you should make sure it's of adequate size. Adequate size also indicates a good cut, meaning better light performance. For example, if given a choice between a poorly cut 1.3 carat Marquise with less sparkle and the same face-up size as a well cut 1.2ct Marquise, which one would you choose?

The bottom line: A diamond must look its weight. This one does. Thumbs up.

1.25 carat Marquise reference diamond
Since there are no specific ideal proportions defined for Marquise cuts, an estimation formula is used to calculate the Marquise reference diamond.
Parameters:
Weight: 1.25ct
Depth: 61%
L/W ratio: 2
 
Calculated values:
Length: 11.18 mm
Width: 5.59 mm
Depth: 3.41 mm
*Est. face-up area: 44.37 mm²
Note: Marquise diamonds with face-up area of within 9% lower and 12% higher than reference Marquise diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Marquise 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 1.5 carat Marquise (11.18×5.59×3.41mm)

The face-up size of this 1.5 carat Marquise (11.18×5.59×3.41mm) is slightly out of normal range for 1.5ct diamonds of this shape. Compared to 1.5 carat Marquise 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.

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 1.5ct Marquise looks like a well cut 1.25ct Marquise.

1.5 carat Marquise reference diamond
Since there are no specific ideal proportions defined for Marquise cuts, an estimation formula is used to calculate the Marquise reference diamond.
Parameters:
Weight: 1.5ct
Depth: 61%
L/W ratio: 2
 
Calculated values:
Length: 11.9 mm
Width: 5.95 mm
Depth: 3.63 mm
*Est. face-up area: 50.27 mm²
Note: Marquise diamonds with face-up area of within 9% lower and 12% higher than reference Marquise diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Marquise 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 1.25ct Marquise (11.18×5.59×3.41mm):
Top surface area = 44.37 mm²
Weight = 1.25ct

Face-up area per carat = 44.37 ÷ 1.25 = 35.5mm²/ct

Face-up area per carat for 1.5ct Marquise (11.18×5.59×3.41mm):
Top surface area = 44.37 mm²
Weight = 1.5ct

Face-up area per carat = 44.37 ÷ 1.5 = 29.58mm²/ct

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