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Cushion|Lab Grown|IGI

1.29ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG713512881

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

Certificate IGI LG713512881

Diamond specifications and retailer prices

From £459 GBP
As of November 3, 2026
Save £1,207 GBP (72%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,666 GBP at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.29ct lab-grown cushion diamond

This 1.29ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG713512881 or 713512881. Listed at 15 retailers as of November 3, 2026, with prices from £459 to £1,666, a £1,207 spread on the same certified stone. Brilliant Earth lists it at £1,666. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG713512881
Dimensions6.41 × 6.19 × 4.29 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
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
6.41 mm6.19 mm1.29 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG713512881
Side View
Table 64.0%Crown 47.3°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 69.3%

Caratlytics Score

How it works →
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 3
Current: £1,666 GBP|Low: £297 GBP|High: £1,666 GBP|Avg: £704 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
November 2, 2026
Retailer 3£297 GBP
Retailer 13£315 GBP
Retailer 9£459 GBP
Retailer 4£481 GBP
Retailer 8£482 GBP
Retailer 5£483 GBP
Retailer 7£511 GBP
Retailer 6£529 GBP
Retailer 10£723 GBP
Retailer 2£758 GBP
Retailer 11£1,012 GBP
Retailer 12£1,189 GBP
Brilliant Earth£1,666 GBP

40 data points across 13 retailers

15 retailers£459 GBP to £1,666 GBP

Retailer 1
-
£297 GBP
Price last confirmed 13 days ago
A
Retailer 2
-
£459 GBP
View
A
Retailer 3
-
£481 GBP
View
A
Retailer 4
-
£482 GBP
View
A
Retailer 5
-
£483 GBP
View
A
Retailer 6
-
£511 GBP
View
A
Retailer 7
-
£529 GBP
View
A
Retailer 8
-
£695 GBP
View
Retailer 9
-
£723 GBP
View
Price last confirmed 9 days ago
A
Retailer 10
-
£758 GBP
View
B+
Retailer 11
-
£987 GBP
View
B+
Retailer 12
-
£1,012 GBP
View
B+
Retailer 13
-
£1,067 GBP
View
Retailer 14
-
£1,189 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
14979838A · Nov 3
£1,666 GBP
$2,230 USD
View
14 more retailers have this diamond
Prices start from £459 GBPSave up to £1,207 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
1.29ct Cushion
£459 GBP