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Heart|Lab Grown|IGI

1.64ct G SI1 Heart Lab Grown Diamond

ID • G/SI1 • IGI LG659468439

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG659468439

Diamond specifications and retailer prices

From $323 AUD
As of November 6, 2026
Save $1,283 AUD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,606 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.64ct lab-grown heart diamond

This 1.64ct lab-grown heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG659468439 or 659468439. Listed at 12 retailers as of November 2, 2026, with prices from $323 to $1,606, a $1,283 spread on the same certified stone. MOH London lists it at $1,606. 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

1.64
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.6°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659468439
Dimensions7.35 × 8.28 × 4.77 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.35 mm8.28 mm1.64 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG659468439
Side View
Table 58.0%Crown 34.6°Girdle: MED-THKPavilion 40.2°Culet: NoneDepth 57.6%

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: $1,606 AUD|Low: $310 AUD|High: $1,627 AUD|Avg: $763 AUD|-1.1%
MOH London
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 7$323 AUD
Retailer 11$375 AUD
Retailer 3$400 AUD
Retailer 8$400 AUD
Retailer 2$509 AUD
Retailer 10$685 AUD
Retailer 5$738 AUD
Retailer 4$777 AUD
Retailer 12$809 AUD
Retailer 9$1,289 AUD
Retailer 6$1,294 AUD
MOH London$1,606 AUD

46 data points across 12 retailers

12 retailers$323 AUD to $1,606 AUD

A
Cheapest Retailer
-
$323 AUD
A
Retailer 2
-
$375 AUD
View
A
Retailer 3
-
$400 AUD
View
Retailer 4
-
$400 AUD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$509 AUD
View
B+
Retailer 6
-
$685 AUD
View
B+
Retailer 7
-
$738 AUD
View
B+
Retailer 8
-
$777 AUD
View
B+
Retailer 9
-
$809 AUD
View
B
Retailer 10
-
$1,289 AUD
View
B
Retailer 11
-
$1,294 AUD
View
Most Expensive
B
MOH London
LG659468439 · Nov 2
$1,606 AUD
£869 GBP
View
11 more retailers have this diamond
Prices start from $323 AUDSave up to $1,283 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
1.64ct Heart
$323 AUD