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1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 628465258

Shape and cutting style on the report: Round brilliant

Certificate IGI 628465258

Diamond specifications and retailer prices

From $2,031 CAD
As of November 6, 2026
Save $3,916 CAD (66%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,947 CAD 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 628465258. Listed at 14 retailers as of November 5, 2026, with prices from $2,031 to $5,947, a $3,916 spread on the same certified stone. NZ Jewellers lists it at $5,947. 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
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 628465258
Dimensions6.90 × 6.84 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.90 mm6.84 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 628465258
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.2%

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: $2,031 CAD|Low: $2,031 CAD|High: $5,043 CAD|Avg: $3,027 CAD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 1$2,031 CAD
Retailer 6$2,570 CAD
Retailer 7$2,599 CAD
Retailer 4$2,612 CAD
Retailer 8$2,624 CAD
Retailer 2$2,722 CAD
Retailer 3$3,464 CAD
Retailer 5$4,983 CAD

37 data points across 8 retailers

14 retailers$2,031 CAD to $5,947 CAD

A
Cheapest Retailer
-
$2,031 CAD
B+
Retailer 2
-
$2,570 CAD
View
A
Retailer 3
-
$2,599 CAD
View
A
Retailer 4
-
$2,612 CAD
View
B+
Retailer 5
-
$2,624 CAD
View
Final sale: no returns
A
Retailer 6
-
$2,722 CAD
View
Retailer 7
-
$2,845 CAD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,845 CAD
View
B+
Retailer 9
-
$2,976 CAD
View
B+
Retailer 10
-
$3,038 CAD
View
B+
Retailer 11
-
$3,282 CAD
View
B+
Retailer 12
-
$3,464 CAD
View
B
Retailer 13
-
$4,983 CAD
View
Most Expensive
B
NZ Jewellers
5ba006be-63d5-4d9e-a568-7e83ac34c81e · Nov 5
$5,947 CAD
$4,258 USD
View
13 more retailers have this diamond
Prices start from $2,031 CADSave up to $3,916 CAD

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
$2,031 CAD