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Heart|Lab Grown|IGI

1.51ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG840623998

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840623998

Diamond specifications and retailer prices

From £464 GBP
As of November 4, 2026
Save £2,077 GBP (82%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,541 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840623998 or 840623998. Listed at 9 retailers as of November 4, 2026, with prices from £464 to £2,541, a £2,077 spread on the same certified stone. Brilliant Earth lists it at £2,541. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840623998
Dimensions7.06 × 7.88 × 4.59 mm
L/W Ratio1.12
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
7.06 mm7.88 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840623998
Side View
Table 58.0%Crown 37.8°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 58.2%

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 4
Current: £2,541 GBP|Low: £464 GBP|High: £2,541 GBP|Avg: £1,603 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£464 GBP
Retailer 8£880 GBP
Retailer 4£892 GBP
Retailer 7£1,764 GBP
Retailer 6£1,856 GBP
Retailer 9£1,930 GBP
Retailer 2£2,035 GBP
Retailer 3£2,259 GBP
Brilliant Earth£2,541 GBP

2 data points across 9 retailers

9 retailers£464 GBP to £2,541 GBP

A
Cheapest Retailer
-
£464 GBP
B+
Retailer 2
-
£880 GBP
View
B+
Retailer 3
-
£892 GBP
View
B
Retailer 4
-
£1,764 GBP
View
B
Retailer 5
-
£1,856 GBP
View
B
Retailer 6
-
£1,930 GBP
View
B
Retailer 7
-
£2,035 GBP
View
B
Retailer 8
-
£2,259 GBP
View
Most Expensive
B
Brilliant Earth
22503510A · Nov 4
£2,541 GBP
$3,430 USD
View
8 more retailers have this diamond
Prices start from £464 GBPSave up to £2,077 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 Heart
£464 GBP