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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 $1,241 NZD
$698 USD
As of November 1, 2026
Save $5,584 NZD (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,825 NZD at Brilliant Earth · As of November 2, 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 November 1, 2026, with prices from $1,241 to $6,825, a $5,584 spread on the same certified stone. Brilliant Earth lists it at $6,825. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $6,825 NZD|Low: $1,241 NZD|High: $8,602 NZD|Avg: $3,678 NZD|-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$1,241 NZD
Retailer 2$1,451 NZD
Retailer 6$1,600 NZD
Retailer 8$2,074 NZD
Retailer 10$2,101 NZD
Retailer 5$3,407 NZD
Retailer 7$5,096 NZD
Retailer 4$5,410 NZD
Retailer 9$5,668 NZD
Brilliant Earth$6,825 NZD

8 data points across 10 retailers

10 retailers$1,241 NZD to $6,825 NZD

A
Cheapest Retailer
-
$1,241 NZD
$698 USD
A
Retailer 2
-
$1,451 NZD
£643 GBP
View
A
Retailer 3
-
$1,600 NZD
$900 USD
View
B+
Retailer 4
-
$2,074 NZD
$1,167 USD
View
B+
Retailer 5
-
$2,101 NZD
$1,182 USD
View
B+
Retailer 6
-
$3,407 NZD
$1,917 USD
View
B
Retailer 7
-
$5,096 NZD
$2,867 USD
View
B
Retailer 8
-
$5,410 NZD
£2,397 GBP
View
B
Retailer 9
-
$5,668 NZD
$3,189 USD
View
Most Expensive
B
Brilliant Earth
22319408A · Nov 2
$6,825 NZD
$3,840 USD
View
9 more retailers have this diamond
Prices start from $1,241 NZDSave up to $5,584 NZD

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
$1,241 NZD