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 $819 USD
£645 GBP
As of October 30, 2026
Save $2,981 USD (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,800 USD at Brilliant Earth · As of October 30, 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 8 retailers as of October 30, 2026, with prices from $819 to $3,800, a $2,981 spread on the same certified stone. Brilliant Earth lists it at $3,800. 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 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,800 USD|Low: $819 USD|High: $4,840 USD|Avg: $2,156 USD|-21.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2$819 USD
Retailer 3$900 USD
Retailer 6$1,167 USD
Retailer 8$1,182 USD
Retailer 5$2,867 USD
Retailer 4$3,059 USD
Retailer 7$3,189 USD
Brilliant Earth$3,800 USD

5 data points across 8 retailers

8 retailers$819 USD to $3,800 USD

A
Cheapest Retailer
-
$819 USD
£645 GBP
A
Retailer 2
-
$900 USD
View
B+
Retailer 3
-
$1,167 USD
View
B+
Retailer 4
-
$1,182 USD
View
B
Retailer 5
-
$2,867 USD
View
B
Retailer 6
-
$3,059 USD
£2,409 GBP
View
B
Retailer 7
-
$3,189 USD
View
Most Expensive
B
Brilliant Earth
22319408A · Oct 30
$3,800 USD
View
7 more retailers have this diamond
Prices start from $819 USDSave up to $2,981 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
$819 USD