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1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • IGI 639424846

Shape and cutting style on the report: Round brilliant

Certificate IGI 639424846

Diamond specifications and retailer prices

From $3,923 CAD
As of November 4, 2026
Save $3,712 CAD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,635 CAD at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 639424846. Listed at 15 retailers as of November 4, 2026, with prices from $3,923 to $7,635, a $3,712 spread on the same certified stone. NZ Jewellers lists it at $7,635. 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
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 639424846
Dimensions6.87 × 6.83 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.87 mm6.83 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 639424846
Side View
Table 60.0%Crown 34.6°Girdle: MediumPavilion 41.3°Culet: NoneDepth 61.1%

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 4
Current: $4,092 CAD|Low: $3,923 CAD|High: $7,240 CAD|Avg: $4,851 CAD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$3,923 CAD
Retailer 6$3,945 CAD
Retailer 8$4,046 CAD
Retailer 1$4,092 CAD
Retailer 9$4,550 CAD
Retailer 2$4,589 CAD
Retailer 3$4,800 CAD
Retailer 4$5,348 CAD
Retailer 5$7,132 CAD

39 data points across 9 retailers

15 retailers$3,923 CAD to $7,635 CAD

A
Cheapest Retailer
-
$3,923 CAD
A
Retailer 2
-
$3,924 CAD
View
A
Retailer 3
-
$3,945 CAD
View
B+
Retailer 4
-
$4,046 CAD
View
Final sale: no returns
A
Retailer 5
-
$4,092 CAD
View
Retailer 6
-
$4,383 CAD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$4,383 CAD
View
B+
Retailer 8
-
$4,550 CAD
View
B+
Retailer 9
-
$4,581 CAD
View
B+
Retailer 10
-
$4,589 CAD
View
B+
Retailer 11
-
$4,800 CAD
View
B
Retailer 12
-
$5,056 CAD
View
B
Retailer 13
-
$5,348 CAD
View
B
Retailer 14
-
$7,132 CAD
View
Most Expensive
B
NZ Jewellers
a8a486c7-4ee6-4846-b6b0-a328558e00b8 · Nov 5
$7,635 CAD
$5,467 USD
View
14 more retailers have this diamond
Prices start from $3,923 CADSave up to $3,712 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
$3,923 CAD