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Cushion|Lab Grown|IGI

1.51ct I VS1 Cushion Lab Grown Diamond

VG • I/VS1 • IGI LG407985767

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG407985767

Diamond specifications and retailer prices

From £305 GBP
$408 USD
As of November 1, 2026
Save £509 GBP (63%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £813 GBP at MOH London · As of October 26, 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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG407985767 or 407985767. Listed at 3 retailers as of October 26, 2026, with prices from £305 to £813, a £509 spread on the same certified stone. MOH London lists it at £813. 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

1.51
Carat
I
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
Crown angle34°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407985767
Dimensions7.07 × 6.39 × 4.20 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.07 mm6.39 mm1.51 ctI / VS1
OriginLab Grown
CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI LG407985767
Side View
Table 64.5%Crown 34°Girdle: MED-VTKPavilion 40.3°Culet: NoneDepth 65.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £813 GBP|Low: £286 GBP|High: £822 GBP|Avg: £524 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 25, 2026
Retailer 2£305 GBP
Retailer 3£422 GBP
Retailer 5£465 GBP
Retailer 4£568 GBP
Retailer 6£608 GBP
MOH London£813 GBP

8 data points across 6 retailers

3 retailers£305 GBP to £813 GBP

B
Cheapest Retailer
-
£305 GBP
$408 USD
B+
Retailer 2
-
£422 GBP
$566 USD
View
Most Expensive
B
MOH London
LG407985767 · Oct 26
£813 GBP
View
2 more retailers have this diamond
Prices start from £305 GBPSave up to £509 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.

B+
1.51ct Cushion
£305 GBP