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Radiant|Natural|GIA

1.21ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 6561517299

Certificate GIA 6561517299

Diamond specifications and retailer prices

From $5,821 CAD
As of November 6, 2026
Save $4,394 CAD (43%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $10,215 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded D 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 6561517299. Listed at 5 retailers as of November 4, 2026, with prices from $5,821 to $10,215, a $4,394 spread on the same certified stone. MOH London lists it at $10,215. 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
D
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.89°
OriginNatural
Grading LabGIA
CertificateGIA 6561517299
Dimensions7.17 × 5.38 × 3.64 mm
L/W Ratio1.33
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
7.17 mm5.38 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561517299
Side View
Table 68.0%Crown 47.89°Girdle: Sli. Thick - ThickPavilionCulet: NoneDepth 67.7%

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: $10,215 CAD|Low: $5,725 CAD|High: $10,675 CAD|Avg: $7,137 CAD|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 5$5,725 CAD
Retailer 4$5,821 CAD
Retailer 2$6,330 CAD
Retailer 3$7,234 CAD
MOH London$10,215 CAD

23 data points across 5 retailers

5 retailers$5,821 CAD to $10,215 CAD

Retailer 1
-
$5,725 CAD
Price last confirmed 13 days ago
B+
Retailer 2
-
$5,821 CAD
View
B+
Retailer 3
-
$6,330 CAD
View
B+
Retailer 4
-
$7,234 CAD
View
Most Expensive
B
MOH London
0DAA789FB · Nov 4
$10,215 CAD
£5,718 GBP
View
4 more retailers have this diamond
Prices start from $5,821 CADSave up to $4,394 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
$5,821 CAD