3.75ct Asscher (8.72×8.72×5.67) vs 1.8ct Asscher (6.83×6.83×4.44)

Diamond size comparison

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Actual size of 3.75ct Asscher diamond
Actual size
sample image
vs.
Actual size of 1.8ct Asscher diamond
Actual size
sample image
3.75 ct Asscher (8.72×8.72×5.67mm) 1.8 ct Asscher (6.83×6.83×4.44mm)
Cutting style
Step cut
Step cut
Weight
3.75 ct
1.8 ct
Measurements
8.72×8.72×5.67 mm
6.83×6.83×4.44 mm
Total depth
65% OK
65% OK
L/W ratio
1
1
Face-up size
Adequate
Adequate
 
This diamond LOOKS its weight!
This diamond 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 3.75ct Asscher (8.72×8.72×5.67mm) and 1.8ct Asscher (6.83×6.83×4.44mm) 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: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on a left finger
3.75ct Asscher on a left ring
64 mm
Right finger image
Ring on a right finger
1.8ct Asscher 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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3.75ct Asscher side view Side view of ring
vs
1.8ct Asscher side view Side view of ring
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Face-up area
69.96 mm²  (±5%)
42.92 mm²  (±5%)
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
3.75ct Asscher (8.72×8.72×5.67mm)
1.8ct Asscher (6.83×6.83×4.44mm)
Difference: 27.04mm² (63%)
3.75 carat Asscher (8.72×8.72×5.67mm) has approx. 63% more face-up area than 1.8 carat Asscher (6.83×6.83×4.44mm).
Face-up area per carat
18.66 mm²/ct
23.84 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).
3.75ct Asscher (8.72×8.72×5.67mm)
1.8ct Asscher (6.83×6.83×4.44mm)
Price (best value)
Min. clarity
VS or better
VS or better
Min. color (platinum setting)
H+
H+
Min. color (yellow gold setting)
I+
I+
Depth percentage
60 - 69%
60 - 69%
Table percentage
58 - 69%
58 - 69%
Length-to-width ratio
1.00 - 1.05
1.00 - 1.05
Min. polish/symmetry
Good or better
Good or better
 Detailed buying guide

Additional Info

3.75ct Asscher (8.72×8.72×5.67mm)
1.8ct Asscher (6.83×6.83×4.44mm)
Face-up size
Normal for 3.75 carat Asscher
Normal for 1.8 carat Asscher
Facets
usually 58
usually 58
Length
8.72 mm
6.83 mm
Width
8.72 mm
6.83 mm
Depth
5.67 mm
4.44 mm
Gram weight
0.75 g (0.0265 ounces)
0.36 g (0.0127 ounces)
Points
375 pts
180 pts
Volume
213.07 mm³
102.27 mm³


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Depth percentage for 3.75 carat Asscher (8.72×8.72×5.67mm)

Depth percentage of Asscher cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 65%, which is OK. (Recommended depth percentage for Asschers is between 60% and 69%)

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

3.75 carat Asscher (8.72×8.72×5.67mm) depth %:
Total depth: 5.67 mm
Width = 8.72 mm
Depth % = (5.67 ÷ 8.72 ) × 100 = 65%

Depth percentage for 1.8 carat Asscher (6.83×6.83×4.44mm)

Depth percentage of Asscher cut is the ratio of the total depth (measured from table to culet) to its width. The total depth percentage of this diamond is 65%, which is OK. (Recommended depth percentage for Asschers is between 60% and 69%)

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

1.8 carat Asscher (6.83×6.83×4.44mm) depth %:
Total depth: 4.44 mm
Width = 6.83 mm
Depth % = (4.44 ÷ 6.83 ) × 100 = 65%

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 3.75 carat Asscher (8.72×8.72×5.67mm)

The face-up size of this 3.75 carat Asscher (8.72×8.72×5.67mm) is within the normal range for 3.75ct diamonds of this shape. Compared to 3.75ct Asscher 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 3.8 carat Asscher with less sparkle and the same face-up size as a well cut 3.4ct Asscher, which one would you choose?

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

3.75 carat Asscher reference diamond
Since there are no specific ideal proportions defined for Asscher cuts, an estimation formula is used to calculate the Asscher reference diamond.
Parameters:
Weight: 3.75ct
Depth: 65%
L/W ratio: 1
 
Calculated values:
Length: 8.72 mm
Width: 8.72 mm
Depth: 5.67 mm
*Est. face-up area: 69.96 mm²
Note: Asscher diamonds with face-up area of within 9% lower and 12% higher than reference Asscher diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Asscher 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 1.8 carat Asscher (6.83×6.83×4.44mm)

The face-up size of this 1.8 carat Asscher (6.83×6.83×4.44mm) is within the normal range for 1.8ct diamonds of this shape. Compared to 1.8ct Asscher 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 1.8 carat Asscher with less sparkle and the same face-up size as a well cut 1.6ct Asscher, which one would you choose?

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

1.8 carat Asscher reference diamond
Since there are no specific ideal proportions defined for Asscher cuts, an estimation formula is used to calculate the Asscher reference diamond.
Parameters:
Weight: 1.8ct
Depth: 65%
L/W ratio: 1
 
Calculated values:
Length: 6.83 mm
Width: 6.83 mm
Depth: 4.44 mm
*Est. face-up area: 42.92 mm²
Note: Asscher diamonds with face-up area of within 9% lower and 12% higher than reference Asscher diamond area are considered to be of adequate face-up size.
* Estimated Face-up area: Face-up area of Asscher 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 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 3.75ct Asscher (8.72×8.72×5.67mm):
Top surface area = 69.96 mm²
Weight = 3.75ct

Face-up area per carat = 69.96 ÷ 3.75 = 18.66mm²/ct

Face-up area per carat for 1.8ct Asscher (6.83×6.83×4.44mm):
Top surface area = 42.92 mm²
Weight = 1.8ct

Face-up area per carat = 42.92 ÷ 1.8 = 23.84mm²/ct

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