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Heart|Lab Grown|IGI

1.51ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663660

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663660

Diamond specifications and retailer prices

From £517 GBP
As of November 4, 2026
Save £2,327 GBP (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,844 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 LG846663660 or 846663660. Listed at 11 retailers as of November 4, 2026, with prices from £517 to £2,844, a £2,327 spread on the same certified stone. Brilliant Earth lists it at £2,844. 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 angle36.1°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663660
Dimensions7.73 × 6.86 × 4.78 mm
L/W Ratio1.13
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
7.73 mm6.86 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663660
Side View
Table 57.0%Crown 36.1°Girdle: STK-THKPavilion 39.5°Culet: NoneDepth 61.8%

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: £2,844 GBP|Low: £517 GBP|High: £3,585 GBP|Avg: £1,505 GBP|-20.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 7£517 GBP
Retailer 4£604 GBP
Retailer 5£615 GBP
Retailer 10£864 GBP
Retailer 3£876 GBP
Retailer 8£1,420 GBP
Retailer 6£1,599 GBP
Retailer 9£2,124 GBP
Retailer 2£2,248 GBP
Retailer 11£2,362 GBP
Brilliant Earth£2,844 GBP

11 data points across 11 retailers

11 retailers£517 GBP to £2,844 GBP

A
Cheapest Retailer
-
£517 GBP
A
Retailer 2
-
£604 GBP
View
A
Retailer 3
-
£615 GBP
View
B+
Retailer 4
-
£864 GBP
View
B+
Retailer 5
-
£876 GBP
View
B+
Retailer 6
-
£1,420 GBP
View
B
Retailer 7
-
£1,599 GBP
View
B
Retailer 8
-
£2,124 GBP
View
B
Retailer 9
-
£2,248 GBP
View
B
Retailer 10
-
£2,362 GBP
View
Most Expensive
B
Brilliant Earth
22319408A · Nov 4
£2,844 GBP
$3,840 USD
View
10 more retailers have this diamond
Prices start from £517 GBPSave up to £2,327 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
£517 GBP