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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 $400 NZD
As of November 6, 2026
Save $1,590 NZD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,991 NZD 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 $400 to $1,991, a $1,590 spread on the same certified stone. MOH London lists it at $1,991. 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: $1,991 NZD|Low: $384 NZD|High: $2,016 NZD|Avg: $946 NZD|-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$400 NZD
Retailer 11$465 NZD
Retailer 3$496 NZD
Retailer 8$496 NZD
Retailer 2$631 NZD
Retailer 10$850 NZD
Retailer 5$915 NZD
Retailer 4$963 NZD
Retailer 12$1,003 NZD
Retailer 9$1,598 NZD
Retailer 6$1,604 NZD
MOH London$1,991 NZD

46 data points across 12 retailers

12 retailers$400 NZD to $1,991 NZD

A
Cheapest Retailer
-
$400 NZD
A
Retailer 2
-
$465 NZD
View
A
Retailer 3
-
$496 NZD
View
Retailer 4
-
$496 NZD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$631 NZD
View
B+
Retailer 6
-
$850 NZD
View
B+
Retailer 7
-
$915 NZD
View
B+
Retailer 8
-
$963 NZD
View
B+
Retailer 9
-
$1,003 NZD
View
B
Retailer 10
-
$1,598 NZD
View
B
Retailer 11
-
$1,604 NZD
View
Most Expensive
B
MOH London
LG659468439 · Nov 2
$1,991 NZD
£869 GBP
View
11 more retailers have this diamond
Prices start from $400 NZDSave up to $1,590 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
1.64ct Heart
$400 NZD