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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG650418911

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG650418911

Diamond specifications and retailer prices

From $388 NZD
As of November 6, 2026
Save $1,849 NZD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,237 NZD at Brilliant Earth · As of November 6, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG650418911 or 650418911. Listed at 14 retailers as of November 6, 2026, with prices from $388 to $2,237, a $1,849 spread on the same certified stone. Brilliant Earth lists it at $2,237. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650418911
Dimensions6.97 × 8.10 × 4.63 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.97 mm8.10 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650418911
Side View
Table 56.0%Crown 33.1°Girdle: MED-STKPavilion 39°Culet: NoneDepth 57.2%

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 6
Current: $2,237 NZD|Low: $384 NZD|High: $3,608 NZD|Avg: $1,150 NZD|-38.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4$388 NZD
Retailer 10$435 NZD
Retailer 12$449 NZD
Retailer 7$482 NZD
Retailer 11$649 NZD
Retailer 2$882 NZD
Retailer 3$897 NZD
Retailer 8$940 NZD
Retailer 9$1,546 NZD
Retailer 5$1,551 NZD
Retailer 6$1,927 NZD
Brilliant Earth$2,237 NZD

45 data points across 12 retailers

14 retailers$388 NZD to $2,237 NZD

A
Cheapest Retailer
-
$388 NZD
A
Retailer 2
-
$435 NZD
View
Final sale: no returns
A
Retailer 3
-
$449 NZD
View
A
Retailer 4
-
$482 NZD
View
Retailer 5
-
$496 NZD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$649 NZD
View
B+
Retailer 7
-
$882 NZD
View
B+
Retailer 8
-
$897 NZD
View
B+
Retailer 9
-
$940 NZD
View
B+
Retailer 10
-
$1,261 NZD
View
B
Retailer 11
-
$1,546 NZD
View
B
Retailer 12
-
$1,551 NZD
View
B
Retailer 13
-
$1,927 NZD
View
Most Expensive
B
Brilliant Earth
12166023A · Nov 6
$2,237 NZD
$1,240 USD
View
13 more retailers have this diamond
Prices start from $388 NZDSave up to $1,849 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
$388 NZD