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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 €622 EUR
$698 USD
As of November 1, 2026
Save €2,801 EUR (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €3,424 EUR at Brilliant Earth · As of October 31, 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 10 retailers as of October 31, 2026, with prices from €622 to €3,424, a €2,801 spread on the same certified stone. Brilliant Earth lists it at €3,424. 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 1
Current: €3,424 EUR|Low: €622 EUR|High: €4,315 EUR|Avg: €1,845 EUR|-20.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3€622 EUR
Retailer 2€728 EUR
Retailer 6€802 EUR
Retailer 8€1,040 EUR
Retailer 10€1,054 EUR
Retailer 5€1,709 EUR
Retailer 7€2,556 EUR
Retailer 4€2,714 EUR
Retailer 9€2,843 EUR
Brilliant Earth€3,424 EUR

8 data points across 10 retailers

10 retailers€622 EUR to €3,424 EUR

A
Cheapest Retailer
-
€622 EUR
$698 USD
A
Retailer 2
-
€728 EUR
£643 GBP
View
A
Retailer 3
-
€802 EUR
$900 USD
View
B+
Retailer 4
-
€1,040 EUR
$1,167 USD
View
B+
Retailer 5
-
€1,054 EUR
$1,182 USD
View
B+
Retailer 6
-
€1,709 EUR
$1,917 USD
View
B
Retailer 7
-
€2,556 EUR
$2,867 USD
View
B
Retailer 8
-
€2,714 EUR
£2,397 GBP
View
B
Retailer 9
-
€2,843 EUR
$3,189 USD
View
Most Expensive
B
Brilliant Earth
22319408A · Oct 31
€3,424 EUR
$3,840 USD
View
9 more retailers have this diamond
Prices start from €622 EURSave up to €2,801 EUR

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
€622 EUR