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Cushion|Lab Grown|IGI

4.10ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG749593778

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG749593778

Diamond specifications and retailer prices

From £566 GBP
$760 USD
As of November 2, 2026
Save £3,227 GBP (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,793 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 4.1ct lab-grown cushion diamond

This 4.1ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG749593778 or 749593778. Listed at 14 retailers as of November 2, 2026, with prices from £566 to £3,793, a £3,227 spread on the same certified stone. Brilliant Earth lists it at £3,793. 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

4.10
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle44.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749593778
Dimensions10.93 × 8.57 × 5.87 mm
L/W Ratio1.28
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.93 mm8.57 mm4.10 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749593778
Side View
Table 65.0%Crown 33°Girdle: MED-THKPavilion 44.3°Culet: NoneDepth 68.5%

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: Nov 2
Current: £3,793 GBP|Low: £441 GBP|High: £4,501 GBP|Avg: £1,304 GBP|-15.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 6£490 GBP
Retailer 4£566 GBP
Retailer 8£618 GBP
Retailer 10£790 GBP
Retailer 13£821 GBP
Retailer 12£825 GBP
Retailer 7£833 GBP
Retailer 11£905 GBP
Retailer 2£1,235 GBP
Retailer 14£1,703 GBP
Retailer 3£1,728 GBP
Retailer 5£2,306 GBP
Retailer 9£2,316 GBP
Brilliant Earth£3,793 GBP

38 data points across 14 retailers

14 retailers£566 GBP to £3,793 GBP

Retailer 1
-
£490 GBP
$657 USD
Price last confirmed 17 days ago
A
Retailer 2
-
£566 GBP
$760 USD
View
A
Retailer 3
-
£618 GBP
$829 USD
View
Final sale: no returns
A
Retailer 4
-
£790 GBP
€1,010 EUR
View
B+
Retailer 5
-
£821 GBP
$1,102 USD
View
A
Retailer 6
-
£825 GBP
$1,107 USD
View
A
Retailer 7
-
£833 GBP
View
A
Retailer 8
-
£905 GBP
$1,214 USD
View
B+
Retailer 9
-
£1,235 GBP
$1,657 USD
View
B
Retailer 10
-
£1,703 GBP
$2,286 USD
View
B
Retailer 11
-
£1,728 GBP
$2,318 USD
View
Retailer 12
-
£2,306 GBP
$3,095 USD
View
Price last confirmed 14 days ago
B
Retailer 13
-
£2,316 GBP
View
Most Expensive
B
Brilliant Earth
21586390A · Nov 2
£3,793 GBP
$5,090 USD
View
13 more retailers have this diamond
Prices start from £566 GBPSave up to £3,227 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
4.10ct Cushion
£566 GBP