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Cushion|Lab Grown|IGI

3.51ct F VVS1 Cushion Lab Grown Diamond

EX • F/VVS1 • IGI LG813654337

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

Certificate IGI LG813654337

Diamond specifications and retailer prices

From £662 GBP
$889 USD
As of November 1, 2026
Save £3,511 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,174 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG813654337 or 813654337. Listed at 21 retailers as of October 27, 2026, with prices from £662 to £4,174, a £3,511 spread on the same certified stone. Queensmith lists it at £4,174. 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
F
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813654337
Dimensions8.90 × 8.68 × 5.56 mm
L/W Ratio1.03
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.90 mm8.68 mm3.51 ctF / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813654337
Side View
Table 62.0%Crown 32.9°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 64.1%

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 1
Current: £1,053 GBP|Low: £662 GBP|High: £3,905 GBP|Avg: £1,727 GBP|-5.3%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 3, 2026
Retailer 8£662 GBP
Retailer 14£796 GBP
Retailer 3£827 GBP
Retailer 6£976 GBP
Retailer 9£982 GBP
Retailer 17£1,041 GBP
Retailer 1£1,053 GBP
Retailer 13£1,502 GBP
Retailer 19£1,550 GBP
Retailer 12£1,595 GBP
Retailer 7£1,687 GBP
Retailer 4£1,998 GBP
Retailer 5£2,135 GBP
Retailer 10£2,302 GBP
Retailer 11£2,373 GBP
Retailer 15£2,572 GBP
Retailer 18£2,824 GBP
Retailer 2£2,970 GBP
Retailer 16£3,905 GBP

27 data points across 19 retailers

21 retailers£662 GBP to £4,174 GBP

A
Cheapest Retailer
-
£662 GBP
$889 USD
Final sale: no returns
Retailer 2
-
£713 GBP
$957 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
£796 GBP
View
A
Retailer 4
-
£827 GBP
$1,110 USD
View
A
Retailer 5
-
£976 GBP
$1,310 USD
View
A
Retailer 6
-
£982 GBP
$1,318 USD
View
A
Retailer 7
-
£1,041 GBP
€1,330 EUR
View
A
Retailer 8
-
£1,053 GBP
View
B+
Retailer 9
-
£1,502 GBP
$2,015 USD
View
B+
Retailer 10
-
£1,550 GBP
A$3,199 AUD
View
B+
Retailer 11
-
£1,595 GBP
ZAR 34,571 ZAR
View
B+
Retailer 12
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£1,687 GBP
$2,264 USD
View
B+
Retailer 13
-
£1,998 GBP
$2,681 USD
View
B
Retailer 14
-
£2,135 GBP
View
B
Retailer 15
-
£2,302 GBP
$3,088 USD
View
B
Retailer 16
-
£2,373 GBP
$3,184 USD
View
B
Retailer 17
-
£2,572 GBP
View
B
Retailer 18
-
£2,824 GBP
A$5,830 AUD
View
B
Retailer 19
-
£2,970 GBP
$3,985 USD
View
B
Retailer 20
-
£3,905 GBP
$5,240 USD
View
Most Expensive
B
Queensmith
LG813654337 · Oct 27
£4,174 GBP
View
20 more retailers have this diamond
Prices start from £662 GBPSave up to £3,511 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
£662 GBP