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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG825661104

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG825661104

Diamond specifications and retailer prices

From £347 GBP
As of November 4, 2026
Save £1,764 GBP (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,111 GBP at Brilliant Earth · As of November 4, 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 LG825661104 or 825661104. Listed at 17 retailers as of November 4, 2026, with prices from £347 to £2,111, a £1,764 spread on the same certified stone. Brilliant Earth lists it at £2,111. 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
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825661104
Dimensions8.63 × 5.81 × 3.73 mm
L/W Ratio1.49
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.63 mm5.81 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825661104
Side View
Table 60.0%Crown 34°Girdle: STK-THKPavilion 32.9°Culet: NoneDepth 64.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £2,111 GBP|Low: £330 GBP|High: £2,496 GBP|Avg: £977 GBP|-15.4%
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
November 5, 2026
Retailer 5£330 GBP
Retailer 8£347 GBP
Retailer 4£500 GBP
Retailer 7£551 GBP
Retailer 11£568 GBP
Retailer 13£661 GBP
Retailer 9£774 GBP
Retailer 10£831 GBP
Retailer 6£1,024 GBP
Retailer 2£1,085 GBP
Retailer 12£1,288 GBP
Retailer 3£1,944 GBP
Brilliant Earth£2,111 GBP

34 data points across 13 retailers

17 retailers£347 GBP to £2,111 GBP

Retailer 1
-
£330 GBP
Price last confirmed 11 days ago
A
Retailer 2
-
£347 GBP
View
A
Retailer 3
-
£500 GBP
View
A
Retailer 4
-
£528 GBP
View
A
Retailer 5
-
£551 GBP
View
A
Retailer 6
-
£568 GBP
View
A
Retailer 7
-
£661 GBP
View
A
Retailer 8
-
£762 GBP
View
A
Retailer 9
-
£774 GBP
View
A
Retailer 10
-
£831 GBP
View
B+
Retailer 11
-
£1,024 GBP
View
B+
Retailer 12
-
£1,085 GBP
View
B+
Retailer 13
-
£1,090 GBP
View
B+
Retailer 14
-
£1,288 GBP
View
B
Retailer 15
-
£1,870 GBP
View
Retailer 16
-
£1,944 GBP
View
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
21612279A · Nov 4
£2,111 GBP
$2,850 USD
View
16 more retailers have this diamond
Prices start from £347 GBPSave up to £1,764 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
£347 GBP