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Cushion|Lab Grown|IGI

1.81ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436044981

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436044981

Diamond specifications and retailer prices

From £332 GBP
$445 USD
As of November 1, 2026
Save £1,106 GBP (77%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,438 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 LG436044981 or 436044981. Listed at 7 retailers as of November 1, 2026, with prices from £332 to £1,438, a £1,106 spread on the same certified stone. MOH London lists it at £1,438. 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 angle34.2°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436044981
Dimensions7.10 × 6.95 × 4.74 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
7.10 mm6.95 mm1.81 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436044981
Side View
Table 61.0%Crown 34.2°Girdle: THK-VTKPavilion 41.6°Culet: NoneDepth 68.2%

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: Nov 1
Current: £1,438 GBP|Low: £324 GBP|High: £1,456 GBP|Avg: £629 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£332 GBP
Retailer 4£368 GBP
Retailer 2£492 GBP
Retailer 3£555 GBP
Retailer 6£558 GBP
Retailer 5£584 GBP
MOH London£1,438 GBP

40 data points across 7 retailers

7 retailers£332 GBP to £1,438 GBP

A
Cheapest Retailer
-
£332 GBP
$445 USD
Final sale: no returns
Retailer 2
-
£368 GBP
$494 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
£492 GBP
View
A
Retailer 4
-
£555 GBP
$745 USD
View
B+
Retailer 5
-
£558 GBP
$749 USD
View
B+
Retailer 6
-
£584 GBP
$784 USD
View
Most Expensive
B
MOH London
LG436044981 · Nov 1
£1,438 GBP
View
6 more retailers have this diamond
Prices start from £332 GBPSave up to £1,106 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.

A
1.81ct Cushion
£332 GBP