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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 £182 GBP
$242 USD
As of October 28, 2026
Save £900 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,081 GBP 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 28, 2026, with prices from £182 to £1,081, a £900 spread on the same certified stone. Brilliant Earth lists it at £1,081. 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

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £1,081 GBP|Low: £182 GBP|High: £1,119 GBP|Avg: £499 GBP|-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£182 GBP
Retailer 9£202 GBP
Retailer 6£272 GBP
Retailer 4£328 GBP
Retailer 2£375 GBP
Retailer 3£413 GBP
Retailer 10£458 GBP
Retailer 8£522 GBP
Retailer 5£814 GBP
Retailer 7£852 GBP
Brilliant Earth£1,081 GBP

44 data points across 11 retailers

14 retailers£182 GBP to £1,081 GBP

A
Cheapest Retailer
-
£182 GBP
$242 USD
Final sale: no returns
A
Retailer 2
-
£202 GBP
$269 USD
View
B+
Retailer 3
-
£272 GBP
$362 USD
View
A
Retailer 4
-
£328 GBP
€416 EUR
View
A
Retailer 5
-
£375 GBP
View
A
Retailer 6
-
£413 GBP
$550 USD
View
A
Retailer 7
-
£458 GBP
$610 USD
View
A
Retailer 8
-
£467 GBP
$622 USD
View
B+
Retailer 9
-
£522 GBP
$695 USD
View
B
Retailer 10
-
£689 GBP
$918 USD
View
B+
Retailer 11
-
£814 GBP
View
B
Retailer 12
-
£852 GBP
$1,135 USD
View
B
Retailer 13
-
£937 GBP
$1,248 USD
View
Most Expensive
B
Brilliant Earth
10789402A · Oct 29
£1,081 GBP
$1,440 USD
View
13 more retailers have this diamond
Prices start from £182 GBPSave up to £900 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
£182 GBP