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Round|Natural|IGI

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 670478896

Shape and cutting style on the report: Round brilliant

Certificate IGI 670478896

Diamond specifications and retailer prices

From $2,466 CAD
As of November 5, 2026
Save $2,303 CAD (48%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,740 CAD at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670478896. Listed at 16 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. 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

1.21
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 670478896
Dimensions6.86 × 6.91 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.86 mm6.91 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670478896
Side View
Table 58.0%Crown 34.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $5,916 CAD|Low: $2,466 CAD|High: $6,740 CAD|Avg: $3,440 CAD|-12.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$2,466 CAD
Retailer 8$2,613 CAD
Retailer 9$2,762 CAD
Retailer 10$2,762 CAD
Retailer 6$2,786 CAD
Retailer 2$2,980 CAD
Retailer 4$3,331 CAD
Retailer 3$3,700 CAD
Retailer 5$4,769 CAD
NZ Jewellers$5,916 CAD

29 data points across 10 retailers

16 retailers$2,466 CAD to $4,769 CAD

A
Cheapest Retailer
-
$2,466 CAD
A
Retailer 2
-
$2,613 CAD
View
Retailer 3
-
$2,762 CAD
View
Price last confirmed 56 days ago
Retailer 4
-
$2,762 CAD
View
Price last confirmed 44 days ago
Retailer 5
-
$2,762 CAD
View
Price last confirmed 15 days ago
A
Retailer 6
-
$2,786 CAD
View
Retailer 7
-
$2,830 CAD
View
Price last confirmed 21 days ago
A
Retailer 8
-
$2,980 CAD
View
Retailer 9
-
$3,188 CAD
View
Price last confirmed 60 days ago
Retailer 10
-
$3,188 CAD
View
Price last confirmed 45 days ago
B+
Retailer 11
-
$3,331 CAD
View
B+
Retailer 12
-
$3,700 CAD
View
B
Retailer 13
-
$4,769 CAD
View
Retailer 14
-
$5,916 CAD
View
Price last confirmed 17 days ago
Retailer 15
-
$6,740 CAD
View
Price last confirmed 57 days ago
Most Expensive
NZ Jewellers
4037a78b-fd2d-45af-aade-16b6d7d538be · Sep 21
$6,740 CAD
$4,826 USD
View
Price last confirmed 45 days ago
15 more retailers have this diamond
Prices start from $2,466 CADSave up to $2,303 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
1.21ct Round
$2,466 CAD