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Round|Natural|IGI

1.50ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 742527340

Shape and cutting style on the report: Round brilliant

Certificate IGI 742527340

Diamond specifications and retailer prices

From $4,300 NZD
As of November 6, 2026
Save $4,885 NZD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $9,595 NZD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural 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 742527340. Listed at 17 retailers as of November 4, 2026, with a 114% 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

1.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 742527340
Dimensions7.27 × 7.22 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.27 mm7.22 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 742527340
Side View
Table 56.0%Crown 36.6°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 63.5%

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: Nov 6
Current: $4,300 NZD|Low: $4,300 NZD|High: $9,321 NZD|Avg: $6,233 NZD|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$4,300 NZD
Retailer 9$4,934 NZD
Retailer 8$5,078 NZD
Retailer 3$5,762 NZD
Retailer 4$6,323 NZD
Retailer 7$6,418 NZD
Retailer 2$6,541 NZD
Retailer 5$6,721 NZD
Retailer 6$9,185 NZD

28 data points across 9 retailers

17 retailers$4,300 NZD to $9,185 NZD

A
Cheapest Retailer
-
$4,300 NZD
A
Retailer 2
-
$4,932 NZD
View
A
Retailer 3
-
$4,934 NZD
View
Retailer 4
-
$4,966 NZD
View
Price last confirmed 95 days ago
A
Retailer 5
-
$5,078 NZD
View
Retailer 6
-
$5,507 NZD
View
Price last confirmed 25 days ago
Retailer 7
-
$5,507 NZD
View
Price last confirmed 29 days ago
Retailer 8
-
$5,718 NZD
View
Price last confirmed 38 days ago
A
Retailer 9
-
$5,762 NZD
View
B+
Retailer 10
-
$5,763 NZD
View
A
Retailer 11
-
$6,323 NZD
View
Retailer 12
-
$6,355 NZD
View
Price last confirmed 28 days ago
A
Retailer 13
-
$6,418 NZD
View
A
Retailer 14
-
$6,541 NZD
View
B+
Retailer 15
-
$6,721 NZD
View
B
Retailer 16
-
$9,185 NZD
View
Most Expensive
NZ Jewellers
94aeded2-6ad3-4a7a-a6fe-65dddb15ba8d · Sep 28
$9,595 NZD
$5,319 USD
View
Price last confirmed 39 days ago
16 more retailers have this diamond
Prices start from $4,300 NZDSave up to $4,885 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
1.50ct Round
$4,300 NZD