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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG771601186

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

Certificate IGI LG771601186

Diamond specifications and retailer prices

From £182 GBP
As of November 6, 2026
Save £574 GBP (76%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £755 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771601186 or 771601186. Listed at 9 retailers as of November 5, 2026, with prices from £182 to £755, a £574 spread on the same certified stone. MOH London lists it at £755. 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771601186
Dimensions6.73 × 6.69 × 4.33 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.73 mm6.69 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771601186
Side View
Table 64.0%Crown 32.6°Girdle: MED-STKPavilion 39°Culet: NoneDepth 64.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £755 GBP|Low: £182 GBP|High: £757 GBP|Avg: £360 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8£182 GBP
Retailer 4£205 GBP
Retailer 2£279 GBP
Retailer 5£286 GBP
Retailer 9£288 GBP
Retailer 10£292 GBP
Retailer 7£333 GBP
Retailer 3£368 GBP
Retailer 6£553 GBP
Retailer 11£665 GBP
MOH London£755 GBP

10 data points across 11 retailers

9 retailers£182 GBP to £755 GBP

A
Cheapest Retailer
-
£182 GBP
A
Retailer 2
-
£205 GBP
View
A
Retailer 3
-
£279 GBP
View
A
Retailer 4
-
£286 GBP
View
B+
Retailer 5
-
£288 GBP
View
Retailer 6
-
£292 GBP
View
Price last confirmed 7 days ago
A
Retailer 7
-
£333 GBP
View
B+
Retailer 8
-
£553 GBP
View
Most Expensive
B
MOH London
LG771601186 · Nov 5
£755 GBP
View
8 more retailers have this diamond
Prices start from £182 GBPSave up to £574 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
1.51ct Cushion
£182 GBP