CaratHunter
Plans
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 $344 AUD
$242 USD
As of October 30, 2026
Save $1,705 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,050 AUD 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 $344 to $2,050, a $1,705 spread on the same certified stone. Brilliant Earth lists it at $2,050. 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
Colour
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: $2,050 AUD|Low: $344 AUD|High: $2,121 AUD|Avg: $945 AUD|-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$344 AUD
Retailer 9$383 AUD
Retailer 6$515 AUD
Retailer 4$622 AUD
Retailer 2$711 AUD
Retailer 3$782 AUD
Retailer 10$868 AUD
Retailer 8$989 AUD
Retailer 5$1,544 AUD
Retailer 7$1,616 AUD
Brilliant Earth$2,050 AUD

44 data points across 11 retailers

14 retailers$344 AUD to $2,050 AUD

A
Cheapest Retailer
-
$344 AUD
$242 USD
Final sale: no returns
A
Retailer 2
-
$383 AUD
$269 USD
View
B+
Retailer 3
-
$515 AUD
$362 USD
View
A
Retailer 4
-
$622 AUD
€416 EUR
View
A
Retailer 5
-
$711 AUD
£393 GBP
View
A
Retailer 6
-
$782 AUD
$550 USD
View
A
Retailer 7
-
$868 AUD
$610 USD
View
A
Retailer 8
-
$885 AUD
$622 USD
View
B+
Retailer 9
-
$989 AUD
$695 USD
View
B
Retailer 10
-
$1,306 AUD
$918 USD
View
B+
Retailer 11
-
$1,544 AUD
£854 GBP
View
B
Retailer 12
-
$1,616 AUD
$1,135 USD
View
B
Retailer 13
-
$1,776 AUD
$1,248 USD
View
Most Expensive
B
Brilliant Earth
10789402A · Oct 29
$2,050 AUD
$1,440 USD
View
13 more retailers have this diamond
Prices start from $344 AUDSave up to $1,705 AUD

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
$344 AUD