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Cushion|Lab Grown|IGI

1.51ct G VS1 Cushion Lab Grown Diamond

VG • G/VS1 • IGI LG766657558

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

Certificate IGI LG766657558

Diamond specifications and retailer prices

From £240 GBP
$322 USD
As of October 28, 2026
Save £639 GBP (73%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £879 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG766657558 or 766657558. Listed at 16 retailers as of October 28, 2026, with prices from £240 to £879, a £639 spread on the same certified stone. Brilliant Earth lists it at £879. 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
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766657558
Dimensions6.70 × 6.38 × 3.91 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.70 mm6.38 mm1.51 ctG / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766657558
Side View
Table 68.0%Crown 37.8°Girdle: THK-VTKPavilion 32.6°Culet: NoneDepth 61.3%

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 28
Current: £879 GBP|Low: £180 GBP|High: £961 GBP|Avg: £489 GBP|-8.5%
Brilliant Earth
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
October 29, 2026
Retailer 7£180 GBP
Retailer 11£240 GBP
Retailer 8£300 GBP
Retailer 12£305 GBP
Retailer 2£322 GBP
Retailer 14£351 GBP
Retailer 10£370 GBP
Retailer 4£419 GBP
Retailer 6£462 GBP
Retailer 3£611 GBP
Retailer 5£671 GBP
Retailer 13£693 GBP
Retailer 15£738 GBP
Retailer 9£835 GBP
Brilliant Earth£879 GBP

40 data points across 15 retailers

16 retailers£240 GBP to £879 GBP

Retailer 1
-
£180 GBP
$241 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
£240 GBP
$322 USD
View
A
Retailer 3
-
£300 GBP
€383 EUR
View
A
Retailer 4
-
£305 GBP
ZAR 6,610 ZAR
View
A
Retailer 5
-
£322 GBP
View
A
Retailer 6
-
£351 GBP
$471 USD
View
A
Retailer 7
-
£370 GBP
$496 USD
View
Retailer 8
-
£419 GBP
A$865 AUD
View
Price last confirmed 7 days ago
Retailer 9
-
£462 GBP
$620 USD
View
Price last confirmed 8 days ago
B
Retailer 10
-
£611 GBP
$820 USD
View
Retailer 11
-
£671 GBP
$900 USD
View
Price last confirmed 15 days ago
B
Retailer 12
-
£693 GBP
View
B
Retailer 13
-
£713 GBP
$957 USD
View
B
Retailer 14
-
£738 GBP
$990 USD
View
B
Retailer 15
-
£835 GBP
View
Most Expensive
B
Brilliant Earth
18645848A · Oct 29
£879 GBP
$1,180 USD
View
15 more retailers have this diamond
Prices start from £240 GBPSave up to £639 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
£240 GBP