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Round|Natural|IGI

1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 828654309

Shape and cutting style on the report: Round brilliant

Certificate IGI 828654309

Diamond specifications and retailer prices

From $2,144 CAD
As of November 4, 2026
Save $2,173 CAD (50%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,229 CAD at NZ Jewellers · As of October 3, 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 828654309. Listed at 12 retailers as of November 4, 2026, with a 101% 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

1.23
Carat
J
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 828654309
Dimensions6.82 × 6.78 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.82 mm6.78 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828654309
Side View
Table 58.0%Crown 36.4°Girdle: Slightly ThickPavilion 40.2°Culet: NoneDepth 62.1%

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: $2,757 CAD|Low: $1,876 CAD|High: $4,627 CAD|Avg: $3,013 CAD|-6.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 8$1,876 CAD
Retailer 6$2,144 CAD
Retailer 7$2,373 CAD
Retailer 3$2,411 CAD
Retailer 9$2,554 CAD
Retailer 1$2,757 CAD
Retailer 2$3,113 CAD
Retailer 5$3,609 CAD
Retailer 4$4,317 CAD

37 data points across 9 retailers

12 retailers$2,144 CAD to $4,317 CAD

Retailer 1
-
$1,876 CAD
Price last confirmed 8 days ago
A
Retailer 2
-
$2,144 CAD
View
A
Retailer 3
-
$2,373 CAD
View
A
Retailer 4
-
$2,411 CAD
View
Retailer 5
-
$2,554 CAD
View
Price last confirmed 34 days ago
Retailer 6
-
$2,712 CAD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$2,739 CAD
View
A
Retailer 8
-
$2,757 CAD
View
B+
Retailer 9
-
$3,113 CAD
View
B+
Retailer 10
-
$3,609 CAD
View
B
Retailer 11
-
$4,317 CAD
View
Most Expensive
NZ Jewellers
290c573a-1e51-4b3a-b4f0-ba1d7f352c8f · Oct 3
$6,229 CAD
$4,460 USD
View
Price last confirmed 34 days ago
11 more retailers have this diamond
Prices start from $2,144 CADSave up to $2,173 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
$2,144 CAD