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Cushion|Lab Grown|IGI

1.81ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG544271792

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG544271792

Diamond specifications and retailer prices

From $242 USD
As of October 30, 2026
Save $1,198 USD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,440 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.81ct lab-grown cushion diamond

This 1.81ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG544271792 or 544271792. Listed at 14 retailers as of October 29, 2026, with prices from $242 to $1,440, a $1,198 spread on the same certified stone. Brilliant Earth lists it at $1,440. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.81
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG544271792
Dimensions7.92 × 6.33 × 4.07 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.92 mm6.33 mm1.81 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG544271792
Side View
Table 61.5%Crown 34.5°Girdle: THK-VTKPavilion 32.7°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,440 USD|Low: $242 USD|High: $1,490 USD|Avg: $664 USD|-3.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 11$242 USD
Retailer 9$269 USD
Retailer 6$362 USD
Retailer 4$437 USD
Retailer 2$499 USD
Retailer 3$550 USD
Retailer 10$610 USD
Retailer 8$695 USD
Retailer 5$1,085 USD
Retailer 7$1,135 USD
Brilliant Earth$1,440 USD

44 data points across 11 retailers

14 retailers$242 USD to $1,440 USD

A
Cheapest Retailer
-
$242 USD
Final sale: no returns
A
Retailer 2
-
$269 USD
View
B+
Retailer 3
-
$362 USD
View
A
Retailer 4
-
$437 USD
€416 EUR
View
A
Retailer 5
-
$499 USD
£393 GBP
View
A
Retailer 6
-
$550 USD
View
A
Retailer 7
-
$610 USD
View
A
Retailer 8
-
$622 USD
View
B+
Retailer 9
-
$695 USD
View
B
Retailer 10
-
$918 USD
View
B+
Retailer 11
-
$1,085 USD
£854 GBP
View
B
Retailer 12
-
$1,135 USD
View
B
Retailer 13
-
$1,248 USD
View
Most Expensive
B
Brilliant Earth
10789402A · Oct 29
$1,440 USD
View
13 more retailers have this diamond
Prices start from $242 USDSave up to $1,198 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.81ct Cushion
$242 USD