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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG669468191

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG669468191

Diamond specifications and retailer prices

From £533 GBP
As of November 4, 2026
Save £1,796 GBP (77%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,259 GBP at Brilliant Earth · As of October 16, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG669468191 or 669468191. Listed at 17 retailers as of November 3, 2026, with a 337% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.4°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG669468191
Dimensions7.98 × 5.85 × 4.05 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.98 mm5.85 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG669468191
Side View
Table 67.0%Crown 32.4°Girdle: THK-VTKPavilion 40°Culet: NoneDepth 69.2%

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 4
Current: £3,259 GBP|Low: £533 GBP|High: £3,259 GBP|Avg: £1,367 GBP
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
Retailer 16
November 5, 2026
Retailer 6£533 GBP
Retailer 16£553 GBP
Retailer 4£666 GBP
Retailer 9£685 GBP
Retailer 15£848 GBP
Retailer 2£874 GBP
Retailer 13£916 GBP
Retailer 11£1,016 GBP
Retailer 10£1,342 GBP
Retailer 5£1,716 GBP
Retailer 8£1,907 GBP
Retailer 3£1,916 GBP
Retailer 7£1,932 GBP
Retailer 14£2,030 GBP
Retailer 12£2,329 GBP
Brilliant Earth£3,259 GBP

45 data points across 16 retailers

17 retailers£533 GBP to £2,329 GBP

A
Cheapest Retailer
-
£533 GBP
Final sale: no returns
Retailer 2
-
£553 GBP
View
Price last confirmed 20 days ago
A
Retailer 3
-
£666 GBP
View
A
Retailer 4
-
£685 GBP
View
A
Retailer 5
-
£848 GBP
View
A
Retailer 6
-
£874 GBP
View
A
Retailer 7
-
£916 GBP
View
A
Retailer 8
-
£1,016 GBP
View
B+
Retailer 9
-
£1,342 GBP
View
B+
Retailer 10
-
£1,716 GBP
View
B
Retailer 11
-
£1,907 GBP
View
B+
Retailer 12
-
£1,916 GBP
View
B
Retailer 13
-
£1,932 GBP
View
Retailer 14
-
£2,030 GBP
View
Price last confirmed 17 days ago
B
Retailer 15
-
£2,108 GBP
View
B
Retailer 16
-
£2,329 GBP
View
Most Expensive
Brilliant Earth
14065763A · Oct 16
£3,259 GBP
$4,400 USD
View
Price last confirmed 19 days ago
16 more retailers have this diamond
Prices start from £533 GBPSave up to £1,796 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
£533 GBP