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Heart|Lab Grown|IGI

1.29ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG776639120

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG776639120

Diamond specifications and retailer prices

From £232 GBP
$311 USD
As of October 30, 2026
Save £921 GBP (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,153 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.29ct lab-grown heart diamond

This 1.29ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG776639120 or 776639120. Listed at 9 retailers as of October 30, 2026, with prices from £232 to £1,153, a £921 spread on the same certified stone. MOH London lists it at £1,153. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG776639120
Dimensions6.94 × 7.66 × 4.41 mm
L/W Ratio1.10
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
6.94 mm7.66 mm1.29 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG776639120
Side View
Table 60.0%Crown 33.8°Girdle: MED-STKPavilion 40°Culet: NoneDepth 57.6%

Caratlytics Score

How it works →
A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,153 GBP|Low: £232 GBP|High: £1,493 GBP|Avg: £657 GBP|-21.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7£232 GBP
Retailer 2£269 GBP
Retailer 9£333 GBP
Retailer 4£458 GBP
Retailer 8£468 GBP
Retailer 6£473 GBP
Retailer 5£844 GBP
Retailer 3£925 GBP
MOH London£1,153 GBP

37 data points across 9 retailers

9 retailers£232 GBP to £1,153 GBP

A+
Cheapest Retailer
-
£232 GBP
$311 USD
A
Retailer 2
-
£269 GBP
$361 USD
View
A
Retailer 3
-
£333 GBP
$447 USD
View
Final sale: no returns
A
Retailer 4
-
£458 GBP
$615 USD
View
A
Retailer 5
-
£468 GBP
$628 USD
View
A
Retailer 6
-
£473 GBP
$635 USD
View
B+
Retailer 7
-
£844 GBP
$1,132 USD
View
B+
Retailer 8
-
£925 GBP
$1,241 USD
View
Most Expensive
B+
MOH London
LG776639120 · Nov 1
£1,153 GBP
View
8 more retailers have this diamond
Prices start from £232 GBPSave up to £921 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 Heart
£232 GBP