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1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 833602422

Shape and cutting style on the report: Round brilliant

Certificate IGI 833602422

Diamond specifications and retailer prices

From $1,979 NZD
As of November 6, 2026
Save $4,508 NZD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,487 NZD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 833602422. Listed at 15 retailers as of November 5, 2026, with prices from $1,979 to $6,487, a $4,508 spread on the same certified stone. NZ Jewellers lists it at $6,487. 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

1.23
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.2°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 833602422
Dimensions6.83 × 6.89 × 4.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.83 mm6.89 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 833602422
Side View
Table 61.0%Crown 36.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.9%

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: $6,487 NZD|Low: $1,979 NZD|High: $6,487 NZD|Avg: $3,130 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 2$1,979 NZD
Retailer 3$2,453 NZD
Retailer 12$2,462 NZD
Retailer 6$2,464 NZD
Retailer 8$2,543 NZD
Retailer 7$2,659 NZD
Retailer 13$2,659 NZD
Retailer 4$2,773 NZD
Retailer 15$2,776 NZD
Retailer 14$2,782 NZD
Retailer 5$3,068 NZD
Retailer 10$3,115 NZD
Retailer 9$3,429 NZD
Retailer 11$4,645 NZD
NZ Jewellers$6,487 NZD

41 data points across 15 retailers

15 retailers$1,979 NZD to $6,487 NZD

A
Cheapest Retailer
-
$1,979 NZD
A
Retailer 2
-
$2,453 NZD
View
Final sale: no returns
A
Retailer 3
-
$2,462 NZD
View
A
Retailer 4
-
$2,464 NZD
View
A
Retailer 5
-
$2,543 NZD
View
Retailer 6
-
$2,659 NZD
View
Price last confirmed 9 days ago
A
Retailer 7
-
$2,659 NZD
View
B+
Retailer 8
-
$2,773 NZD
View
B+
Retailer 9
-
$2,776 NZD
View
B+
Retailer 10
-
$2,782 NZD
View
B+
Retailer 11
-
$3,068 NZD
View
A
Retailer 12
-
$3,115 NZD
View
A
Retailer 13
-
$3,429 NZD
View
B+
Retailer 14
-
$4,645 NZD
View
Most Expensive
B
NZ Jewellers
34ba6b30-4a1b-4995-bdf9-ad59beae8489 · Nov 5
$6,487 NZD
$3,596 USD
View
14 more retailers have this diamond
Prices start from $1,979 NZDSave up to $4,508 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
$1,979 NZD