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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 $299 NZD
$168 USD
As of October 28, 2026
Save $1,321 NZD (82%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,620 NZD 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 $299 to $1,620, a $1,321 spread on the same certified stone. MOH London lists it at $1,620. 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 28
Current: $1,620 NZD|Low: $299 NZD|High: $1,636 NZD|Avg: $687 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 28, 2026
Retailer 5$299 NZD
Retailer 3$423 NZD
Retailer 2$531 NZD
Retailer 4$632 NZD
MOH London$1,620 NZD

39 data points across 5 retailers

5 retailers$299 NZD to $1,620 NZD

A
Cheapest Retailer
-
$299 NZD
$168 USD
B+
Retailer 2
-
$423 NZD
£187 GBP
View
B+
Retailer 3
-
$531 NZD
£235 GBP
View
B
Retailer 4
-
$632 NZD
$355 USD
View
Most Expensive
B
MOH London
LG831650686 · Oct 25
$1,620 NZD
£716 GBP
View
4 more retailers have this diamond
Prices start from $299 NZDSave up to $1,321 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
0.51ct Heart
$299 NZD