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Cushion|Lab Grown|IGI

3.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG749583773

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

Certificate IGI LG749583773

Diamond specifications and retailer prices

From £2,086 GBP
$2,778 USD
As of October 29, 2026
Save £5,228 GBP (71%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £7,314 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG749583773 or 749583773. Listed at 22 retailers as of October 29, 2026, with prices from £2,086 to £7,314, a £5,228 spread on the same certified stone. Brilliant Earth lists it at £7,314. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle31.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749583773
Dimensions8.52 × 8.11 × 5.37 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.52 mm8.11 mm3.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749583773
Side View
Table 64.0%Crown 38.6°Girdle: THK-VTKPavilion 31.4°Culet: NoneDepth 66.2%

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 29
Current: £7,314 GBP|Low: £1,376 GBP|High: £7,314 GBP|Avg: £3,712 GBP|+36.0%
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
Retailer 15
October 30, 2026
Retailer 4£1,997 GBP
Retailer 6£2,086 GBP
Retailer 13£2,106 GBP
Retailer 15£2,121 GBP
Retailer 2£2,749 GBP
Retailer 11£2,854 GBP
Retailer 14£2,855 GBP
Retailer 9£3,184 GBP
Retailer 7£3,788 GBP
Retailer 12£4,515 GBP
Retailer 8£4,636 GBP
Retailer 3£5,065 GBP
Retailer 10£5,446 GBP
Retailer 5£6,682 GBP
Brilliant Earth£7,314 GBP

45 data points across 15 retailers

22 retailers£2,086 GBP to £7,314 GBP

Retailer 1
-
£1,997 GBP
$2,659 USD
Price last confirmed 19 days ago
A
Retailer 2
-
£2,086 GBP
$2,778 USD
View
A
Retailer 3
-
£2,106 GBP
$2,805 USD
View
Final sale: no returns
A
Retailer 4
-
£2,121 GBP
$2,825 USD
View
A
Retailer 5
-
£2,307 GBP
HK$24,000 HKD
View
A
Retailer 6
-
£2,749 GBP
View
A
Retailer 7
-
£2,854 GBP
$3,800 USD
View
A
Retailer 8
-
£2,855 GBP
$3,802 USD
View
A
Retailer 9
-
£3,184 GBP
€4,038 EUR
View
A
Retailer 10
-
£3,383 GBP
$4,505 USD
View
B+
Retailer 11
-
£3,788 GBP
View
Retailer 12
-
£4,515 GBP
A$9,251 AUD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£4,636 GBP
ZAR 99,736 ZAR
View
B+
Retailer 14
-
£4,956 GBP
$6,600 USD
View
B+
Retailer 15
-
£5,065 GBP
$6,745 USD
View
B+
Retailer 16
-
£5,330 GBP
$7,098 USD
View
B+
Retailer 17
-
£5,446 GBP
View
B+
Retailer 18
-
£5,579 GBP
$7,429 USD
View
B+
Retailer 19
-
£5,909 GBP
$7,869 USD
View
B
Retailer 20
-
£6,682 GBP
SGD 12,025 SGD
View
B
Retailer 21
-
£6,974 GBP
$9,287 USD
View
Most Expensive
B
Brilliant Earth
16596317A · Oct 29
£7,314 GBP
$9,740 USD
View
21 more retailers have this diamond
Prices start from £2,086 GBPSave up to £5,228 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
3.51ct Cushion
£2,086 GBP