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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG839634140

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839634140

Diamond specifications and retailer prices

From $678 AUD
As of November 6, 2026
Save $910 AUD (57%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,588 AUD at MOH London · As of November 5, 2026
View at MOH London

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 LG839634140 or 839634140. Listed at 4 retailers as of November 5, 2026, with prices from $678 to $1,588, a $910 spread on the same certified stone. MOH London lists it at $1,588. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.4°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839634140
Dimensions7.87 × 7.02 × 4.58 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
7.87 mm7.02 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839634140
Side View
Table 63.0%Crown 39.4°Girdle: MED-STKPavilion 37.7°Culet: NoneDepth 58.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: $1,588 AUD|Low: $678 AUD|High: $1,591 AUD|Avg: $894 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 4$678 AUD
Retailer 3$726 AUD
Retailer 2$731 AUD
MOH London$1,588 AUD

7 data points across 4 retailers

4 retailers$678 AUD to $1,588 AUD

B+
Cheapest Retailer
-
$678 AUD
B+
Retailer 2
-
$726 AUD
View
B+
Retailer 3
-
$731 AUD
View
Most Expensive
B
MOH London
LG839634140 · Nov 5
$1,588 AUD
£859 GBP
View
3 more retailers have this diamond
Prices start from $678 AUDSave up to $910 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.

B+
1.51ct Heart
$678 AUD