CaratHunter
Plans
Round|Lab Grown|IGI

1.64ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG425066535

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425066535

Diamond specifications and retailer prices

From $1,650 NZD
$930 USD
As of October 31, 2026
Save $3,236 NZD (66%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,389 NZD at MOH London · As of October 25, 2026
View at MOH London

About this 1.64ct lab-grown round diamond

This 1.64ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425066535 or 425066535. Listed at 11 retailers as of October 31, 2026, with a 196% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle31.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425066535
Dimensions7.68 × 7.69 × 4.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.68 mm7.69 mm1.64 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG425066535
Side View
Table 59.0%Crown 31.9°GirdlePavilion 40.7°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $8,389 NZD|Low: $1,650 NZD|High: $8,477 NZD|Avg: $3,930 NZD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2$1,650 NZD
Retailer 3$2,248 NZD
Retailer 6$2,518 NZD
Retailer 4$2,608 NZD
Retailer 7$2,910 NZD
Retailer 9$3,616 NZD
Retailer 5$4,127 NZD
Retailer 8$4,860 NZD
MOH London$8,389 NZD

10 data points across 9 retailers

11 retailers$1,650 NZD to $4,886 NZD

A
Cheapest Retailer
-
$1,650 NZD
$930 USD
B+
Retailer 2
-
$2,248 NZD
$1,267 USD
View
B+
Retailer 3
-
$2,445 NZD
$1,378 USD
View
B+
Retailer 4
-
$2,518 NZD
$1,419 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,608 NZD
$1,470 USD
View
Retailer 6
-
$2,608 NZD
$1,470 USD
View
Price last confirmed 20 days ago
B
Retailer 7
-
$2,910 NZD
$1,640 USD
View
B
Retailer 8
-
$4,127 NZD
$2,326 USD
View
B
Retailer 9
-
$4,860 NZD
$2,739 USD
View
B
Retailer 10
-
$4,886 NZD
$2,754 USD
View
Most Expensive
MOH London
LG425066535 · Oct 25
$8,389 NZD
£3,723 GBP
View
Price last confirmed 7 days ago
10 more retailers have this diamond
Prices start from $1,650 NZDSave up to $3,236 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 Round
$1,650 NZD