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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 $313 AUD
As of November 6, 2026
Save $1,492 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,805 AUD 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 $313 to $1,805, a $1,492 spread on the same certified stone. Brilliant Earth lists it at $1,805. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,805 AUD|Low: $310 AUD|High: $2,911 AUD|Avg: $927 AUD|-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$313 AUD
Retailer 10$351 AUD
Retailer 12$362 AUD
Retailer 7$389 AUD
Retailer 11$524 AUD
Retailer 2$712 AUD
Retailer 3$723 AUD
Retailer 8$758 AUD
Retailer 9$1,247 AUD
Retailer 5$1,252 AUD
Retailer 6$1,554 AUD
Brilliant Earth$1,805 AUD

45 data points across 12 retailers

14 retailers$313 AUD to $1,805 AUD

A
Cheapest Retailer
-
$313 AUD
A
Retailer 2
-
$351 AUD
View
Final sale: no returns
A
Retailer 3
-
$362 AUD
View
A
Retailer 4
-
$389 AUD
View
Retailer 5
-
$400 AUD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$524 AUD
View
B+
Retailer 7
-
$712 AUD
View
B+
Retailer 8
-
$723 AUD
View
B+
Retailer 9
-
$758 AUD
View
B+
Retailer 10
-
$1,017 AUD
View
B
Retailer 11
-
$1,247 AUD
View
B
Retailer 12
-
$1,252 AUD
View
B
Retailer 13
-
$1,554 AUD
View
Most Expensive
B
Brilliant Earth
12166023A · Nov 6
$1,805 AUD
$1,240 USD
View
13 more retailers have this diamond
Prices start from $313 AUDSave up to $1,492 AUD

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
$313 AUD