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Cushion|Lab Grown|IGI

4.51ct F VS2 Cushion Lab Grown Diamond

EX • F/VS2 • IGI LG821640786

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

Certificate IGI LG821640786

Diamond specifications and retailer prices

From £889 GBP
$1,191 USD
As of November 1, 2026
Save £1,398 GBP (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,287 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 4.51ct lab-grown cushion diamond

This 4.51ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821640786 or 821640786. Listed at 6 retailers as of November 1, 2026, with prices from £889 to £2,287, a £1,398 spread on the same certified stone. MOH London lists it at £2,287. 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

4.51
Carat
F
Colour
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821640786
Dimensions9.52 × 9.14 × 5.88 mm
L/W Ratio1.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.52 mm9.14 mm4.51 ctF / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821640786
Side View
Table 57.0%Crown 35.9°Girdle: MED-STKPavilion 32.1°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,287 GBP|Low: £870 GBP|High: £2,315 GBP|Avg: £1,370 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4£889 GBP
Retailer 2£910 GBP
Retailer 3£944 GBP
Retailer 6£1,316 GBP
Retailer 5£1,875 GBP
MOH London£2,287 GBP

42 data points across 6 retailers

6 retailers£889 GBP to £2,287 GBP

B+
Cheapest Retailer
-
£889 GBP
$1,191 USD
A
Retailer 2
-
£910 GBP
View
A
Retailer 3
-
£944 GBP
€1,204 EUR
View
A
Retailer 4
-
£1,316 GBP
$1,763 USD
View
B+
Retailer 5
-
£1,875 GBP
$2,512 USD
View
Most Expensive
B+
MOH London
LG821640786 · Nov 1
£2,287 GBP
View
5 more retailers have this diamond
Prices start from £889 GBPSave up to £1,398 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
4.51ct Cushion
£889 GBP