Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

ID • F/SI1 • GIA 5231753899

Certificate GIA 5231753899

Diamond specifications and retailer prices

From $4,827 CAD
As of November 2, 2026
Save $4,612 CAD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,835 CAD at NZ Jewellers · As of October 30, 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 F 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 5231753899. Listed at 15 retailers as of November 1, 2026, with a 96% 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
F
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.84°
Pavilion angle31.37°
OriginNatural
Grading LabGIA
CertificateGIA 5231753899
Dimensions6.75 × 5.25 × 3.63 mm
L/W Ratio1.29
Top View
6.75 mm5.25 mm1.21 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231753899
Side View
Table 65.0%Crown 44.84°Girdle: ThickPavilion 31.37°Culet: NoneDepth 69.2%

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 2
Current: $9,835 CAD|Low: $4,827 CAD|High: $11,997 CAD|Avg: $6,954 CAD|-18.0%
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 3, 2026
Retailer 5$4,827 CAD
Retailer 9$4,906 CAD
Retailer 3$5,055 CAD
Retailer 4$5,514 CAD
Retailer 6$5,617 CAD
Retailer 11$5,617 CAD
Retailer 2$5,830 CAD
Retailer 12$5,837 CAD
Retailer 14$5,837 CAD
Retailer 13$6,034 CAD
Retailer 7$6,280 CAD
Retailer 10$8,237 CAD
Retailer 8$9,440 CAD
NZ Jewellers$9,835 CAD

39 data points across 14 retailers

15 retailers$4,827 CAD to $9,440 CAD

B+
Cheapest Retailer
-
$4,827 CAD
B+
Retailer 2
-
$4,906 CAD
View
B+
Retailer 3
-
$5,055 CAD
View
Retailer 4
-
$5,514 CAD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$5,617 CAD
View
B+
Retailer 6
-
$5,617 CAD
View
B+
Retailer 7
-
$5,830 CAD
View
Retailer 8
-
$5,837 CAD
View
Price last confirmed 8 days ago
Retailer 9
-
$5,837 CAD
View
Price last confirmed 8 days ago
Retailer 10
-
$6,034 CAD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$6,280 CAD
View
B
Retailer 12
-
$7,082 CAD
View
Retailer 13
-
$8,237 CAD
View
Price last confirmed 11 days ago
B
Retailer 14
-
$9,440 CAD
View
Most Expensive
NZ Jewellers
35a80dc2-e68c-4c01-970b-8ebe5c41a2e5 · Oct 30
$9,835 CAD
$6,992 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from $4,827 CADSave up to $4,612 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
$4,827 CAD