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Cushion|Lab Grown|IGI

3.51ct E VVS1 Cushion Lab Grown Diamond

VG • E/VVS1 • IGI LG657420515

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG657420515

Diamond specifications and retailer prices

From £763 GBP
$1,022 USD
As of October 31, 2026
Save £3,902 GBP (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £4,665 GBP at Brilliant Earth · As of October 31, 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 VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG657420515 or 657420515. Listed at 22 retailers as of October 31, 2026, with prices from £763 to £4,665, a £3,902 spread on the same certified stone. Brilliant Earth lists it at £4,665. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.51
Carat
E
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG657420515
Dimensions10.66 × 7.12 × 5.01 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.66 mm7.12 mm3.51 ctE / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG657420515
Side View
Table 69.0%Crown 45°Girdle: MED-THKPavilion 35.5°Culet: NoneDepth 70.4%

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 31
Current: £4,665 GBP|Low: £763 GBP|High: £6,717 GBP|Avg: £2,063 GBP|-30.6%
Brilliant Earth
Retailer 2
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Retailer 21
November 1, 2026
Retailer 5£763 GBP
Retailer 4£790 GBP
Retailer 20£917 GBP
Retailer 3£952 GBP
Retailer 7£1,007 GBP
Retailer 18£1,131 GBP
Retailer 2£1,217 GBP
Retailer 13£1,257 GBP
Retailer 16£1,562 GBP
Retailer 11£1,805 GBP
Retailer 17£1,835 GBP
Retailer 9£1,925 GBP
Retailer 14£2,184 GBP
Retailer 19£2,346 GBP
Retailer 6£2,588 GBP
Retailer 8£2,652 GBP
Retailer 21£2,694 GBP
Retailer 10£2,746 GBP
Retailer 12£2,847 GBP
Retailer 15£3,127 GBP
Brilliant Earth£4,665 GBP

33 data points across 21 retailers

22 retailers£763 GBP to £4,665 GBP

A
Cheapest Retailer
-
£763 GBP
$1,022 USD
Final sale: no returns
Retailer 2
-
£790 GBP
$1,059 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£917 GBP
HK$9,600 HKD
View
A
Retailer 4
-
£952 GBP
$1,275 USD
View
A
Retailer 5
-
£1,007 GBP
$1,349 USD
View
A
Retailer 6
-
£1,131 GBP
$1,515 USD
View
A
Retailer 7
-
£1,217 GBP
View
A
Retailer 8
-
£1,257 GBP
€1,604 EUR
View
B+
Retailer 9
-
£1,562 GBP
$2,093 USD
View
B+
Retailer 10
-
£1,805 GBP
$2,418 USD
View
B+
Retailer 11
-
£1,835 GBP
ZAR 39,715 ZAR
View
B+
Retailer 12
-
£1,925 GBP
$2,579 USD
View
B+
Retailer 13
-
£2,184 GBP
View
B+
Retailer 14
-
£2,346 GBP
$3,143 USD
View
B+
Retailer 15
-
£2,472 GBP
$3,312 USD
View
B
Retailer 16
-
£2,588 GBP
$3,468 USD
View
B
Retailer 17
-
£2,652 GBP
SGD 4,802 SGD
View
B+
Retailer 18
-
£2,694 GBP
View
B
Retailer 19
-
£2,746 GBP
$3,680 USD
View
B
Retailer 20
-
£2,843 GBP
$3,809 USD
View
B
Retailer 21
-
£3,127 GBP
A$6,446 AUD
View
Most Expensive
B
Brilliant Earth
11858242A · Oct 31
£4,665 GBP
$6,250 USD
View
21 more retailers have this diamond
Prices start from £763 GBPSave up to £3,902 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
£763 GBP