Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2518450103

Certificate GIA 2518450103

Diamond specifications and retailer prices

From $5,415 CAD
As of November 6, 2026
Save $5,723 CAD (51%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $11,139 CAD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2518450103. Listed at 14 retailers as of November 5, 2026, with prices from $5,415 to $11,139, a $5,723 spread on the same certified stone. NZ Jewellers lists it at $11,139. 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
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.29°
Pavilion angle30.5°
OriginNatural
Grading LabGIA
CertificateGIA 2518450103
Dimensions6.67 × 5.23 × 3.64 mm
L/W Ratio1.28
Top View
6.67 mm5.23 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2518450103
Side View
Table 65.0%Crown 44.29°Girdle: THK-VTKPavilion 30.5°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $11,139 CAD|Low: $5,415 CAD|High: $11,521 CAD|Avg: $7,432 CAD|-3.3%
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
November 7, 2026
Retailer 5$5,415 CAD
Retailer 10$5,519 CAD
Retailer 4$5,730 CAD
Retailer 12$5,943 CAD
Retailer 2$6,355 CAD
Retailer 6$6,368 CAD
Retailer 3$6,583 CAD
Retailer 13$6,583 CAD
Retailer 7$6,791 CAD
Retailer 14$6,808 CAD
Retailer 8$6,868 CAD
Retailer 11$9,338 CAD
Retailer 9$10,154 CAD
NZ Jewellers$11,139 CAD

43 data points across 14 retailers

14 retailers$5,415 CAD to $11,139 CAD

B+
Cheapest Retailer
-
$5,415 CAD
B+
Retailer 2
-
$5,519 CAD
View
B+
Retailer 3
-
$5,730 CAD
View
B+
Retailer 4
-
$5,943 CAD
View
B+
Retailer 5
-
$6,355 CAD
View
B+
Retailer 6
-
$6,368 CAD
View
B+
Retailer 7
-
$6,583 CAD
View
B+
Retailer 8
-
$6,583 CAD
View
B
Retailer 9
-
$6,791 CAD
View
B
Retailer 10
-
$6,808 CAD
View
B+
Retailer 11
-
$6,868 CAD
View
B
Retailer 12
-
$9,338 CAD
View
B
Retailer 13
-
$10,154 CAD
View
Most Expensive
B
NZ Jewellers
c41f34da-ef32-4739-bab4-64ae197ec1fe · Nov 5
$11,139 CAD
$7,919 USD
View
13 more retailers have this diamond
Prices start from $5,415 CADSave up to $5,723 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.

B+
1.21ct Radiant
$5,415 CAD