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Cushion|Lab Grown|IGI

1.81ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436045044

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG436045044

Diamond specifications and retailer prices

From £791 GBP
$1,060 USD
As of October 31, 2026
Save £3,061 GBP (79%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,852 GBP at MOH London · As of November 1, 2026
View at MOH London

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045044 or 436045044. Listed at 6 retailers as of October 31, 2026, with prices from £791 to £3,852, a £3,061 spread on the same certified stone. MOH London lists it at £3,852. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045044
Dimensions7.47 × 7.14 × 4.42 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.47 mm7.14 mm1.81 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045044
Side View
Table 64.0%Crown 34.1°Girdle: MED-THKPavilion 37.6°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £3,852 GBP|Low: £791 GBP|High: £3,903 GBP|Avg: £2,056 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 2£791 GBP
Retailer 5£1,302 GBP
Retailer 3£1,349 GBP
Retailer 6£1,474 GBP
Retailer 9£1,492 GBP
Retailer 7£1,826 GBP
Retailer 4£2,123 GBP
MOH London£3,852 GBP
Retailer 8£3,861 GBP

15 data points across 9 retailers

6 retailers£791 GBP to £3,852 GBP

B+
Cheapest Retailer
-
£791 GBP
$1,060 USD
B
Retailer 2
-
£1,302 GBP
$1,744 USD
View
Final sale: no returns
Retailer 3
-
£1,349 GBP
$1,807 USD
View
Price last confirmed 20 days ago
B
Retailer 4
-
£1,474 GBP
$1,975 USD
View
B
Retailer 5
-
£2,123 GBP
$2,844 USD
View
Most Expensive
B
MOH London
LG436045044 · Nov 1
£3,852 GBP
View
5 more retailers have this diamond
Prices start from £791 GBPSave up to £3,061 GBP

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.

B+
1.81ct Cushion
£791 GBP