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 $626 USD
As of November 4, 2026
Save $2,804 USD (82%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,430 USD 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 $626 to $3,430, a $2,804 spread on the same certified stone. Brilliant Earth lists it at $3,430. 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
Color
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: $3,430 USD|Low: $626 USD|High: $3,430 USD|Avg: $2,165 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$626 USD
Retailer 8$1,188 USD
Retailer 4$1,204 USD
Retailer 7$2,381 USD
Retailer 6$2,505 USD
Retailer 9$2,605 USD
Retailer 2$2,747 USD
Retailer 3$3,049 USD
Brilliant Earth$3,430 USD

2 data points across 9 retailers

9 retailers$626 USD to $3,430 USD

A
Cheapest Retailer
-
$626 USD
B+
Retailer 2
-
$1,188 USD
View
B+
Retailer 3
-
$1,204 USD
View
B
Retailer 4
-
$2,381 USD
View
B
Retailer 5
-
$2,505 USD
View
B
Retailer 6
-
$2,605 USD
View
B
Retailer 7
-
$2,747 USD
View
B
Retailer 8
-
$3,049 USD
View
Most Expensive
B
Brilliant Earth
22503510A · Nov 4
$3,430 USD
View
8 more retailers have this diamond
Prices start from $626 USDSave up to $2,804 USD

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
$626 USD