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Heart|Lab Grown|IGI

0.51ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG831650686

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831650686

Diamond specifications and retailer prices

From $239 AUD
$168 USD
As of October 30, 2026
Save $1,055 AUD (82%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,295 AUD at MOH London · As of October 25, 2026
View at MOH London

About this 0.51ct lab-grown heart diamond

This 0.51ct lab-grown heart sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831650686 or 831650686. Listed at 5 retailers as of October 25, 2026, with prices from $239 to $1,295, a $1,055 spread on the same certified stone. MOH London lists it at $1,295. 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

0.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831650686
Dimensions5.63 × 4.94 × 3.16 mm
L/W Ratio1.14
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.63 mm4.94 mm0.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG831650686
Side View
Table 64.0%Crown 36°Girdle: THN-MEDPavilion 37.6°Culet: NoneDepth 56.1%

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: Oct 30
Current: $1,295 AUD|Low: $239 AUD|High: $1,307 AUD|Avg: $553 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 5$239 AUD
Retailer 2$340 AUD
Retailer 3$425 AUD
Retailer 4$505 AUD
MOH London$1,295 AUD

40 data points across 5 retailers

5 retailers$239 AUD to $1,295 AUD

A
Cheapest Retailer
-
$239 AUD
$168 USD
B+
Retailer 2
-
$340 AUD
£188 GBP
View
B+
Retailer 3
-
$425 AUD
£235 GBP
View
B
Retailer 4
-
$505 AUD
$355 USD
View
Most Expensive
B
MOH London
LG831650686 · Oct 25
$1,295 AUD
£716 GBP
View
4 more retailers have this diamond
Prices start from $239 AUDSave up to $1,055 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
0.51ct Heart
$239 AUD