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Round|Natural|IGI

1.23ct J VS1 Round Natural Diamond

EX • J/VS1 • IGI 642405058

Shape and cutting style on the report: Round brilliant

Certificate IGI 642405058

Diamond specifications and retailer prices

From $3,662 NZD
As of November 4, 2026
Save $3,420 NZD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,803 NZD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI 642405058. Listed at 15 retailers as of November 4, 2026, with a 93% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
J
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 642405058
Dimensions6.86 × 6.89 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.86 mm6.89 mm1.23 ctJ / VS1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 642405058
Side View
Table 56.0%Crown 34.1°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.0%

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 4
Current: $4,456 NZD|Low: $3,662 NZD|High: $7,465 NZD|Avg: $4,824 NZD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$3,662 NZD
Retailer 8$3,821 NZD
Retailer 7$4,068 NZD
Retailer 1$4,456 NZD
Retailer 3$4,650 NZD
Retailer 4$4,948 NZD
Retailer 2$5,024 NZD
Retailer 6$7,082 NZD

29 data points across 8 retailers

15 retailers$3,662 NZD to $7,082 NZD

A
Cheapest Retailer
-
$3,662 NZD
A
Retailer 2
-
$3,821 NZD
View
Retailer 3
-
$4,006 NZD
View
Price last confirmed 102 days ago
A
Retailer 4
-
$4,068 NZD
View
Retailer 5
-
$4,106 NZD
View
Price last confirmed 44 days ago
Retailer 6
-
$4,210 NZD
View
Price last confirmed 21 days ago
Retailer 7
-
$4,210 NZD
View
Price last confirmed 19 days ago
A
Retailer 8
-
$4,456 NZD
View
A
Retailer 9
-
$4,650 NZD
View
Retailer 10
-
$4,739 NZD
View
Price last confirmed 45 days ago
B+
Retailer 11
-
$4,948 NZD
View
B+
Retailer 12
-
$5,024 NZD
View
B
Retailer 13
-
$7,082 NZD
View
Retailer 14
-
$8,585 NZD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
7282c147-c874-492c-8544-55902c3b9aac · Oct 17
$8,803 NZD
$4,880 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $3,662 NZDSave up to $3,420 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
1.23ct Round
$3,662 NZD