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Radiant|Natural|HRD

1.21ct D SI2 Radiant Natural Diamond

ID • D/SI2 • HRD 210000104145

Shape and cutting style on the report: Radiant

Certificate HRD 210000104145

Diamond specifications and retailer prices

From $4,387 USD
As of November 4, 2026
Save $3,603 USD (45%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $7,990 USD 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by HRD 210000104145. Listed at 5 retailers as of November 4, 2026, with prices from $4,387 to $7,990, a $3,603 spread on the same certified stone. MOH London lists it at $7,990. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabHRD
CertificateHRD 210000104145
Dimensions6.47 × 5.39 × 3.69 mm
L/W Ratio1.20
Girdle conditionPolished
Culet sizeNone
Top View
6.47 mm5.39 mm1.21 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 210000104145
Side View
Table 65.0%CrownGirdle: ThickPavilionCulet: 0.0Depth 69.0%

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 4
Current: $7,990 USD|Low: $4,281 USD|High: $8,108 USD|Avg: $5,446 USD|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$4,356 USD
Retailer 5$4,387 USD
Retailer 3$4,526 USD
Retailer 4$5,030 USD
Retailer 2$5,660 USD
Retailer 7$6,158 USD
MOH London$7,990 USD

27 data points across 7 retailers

5 retailers$4,387 USD to $7,990 USD

B+
Cheapest Retailer
-
$4,387 USD
B+
Retailer 2
-
$4,526 USD
View
Retailer 3
-
$5,030 USD
View
Price last confirmed 9 days ago
B
Retailer 4
-
$5,660 USD
View
Most Expensive
B
MOH London
1704B527F · Nov 4
$7,990 USD
£6,291 GBP
View
4 more retailers have this diamond
Prices start from $4,387 USDSave up to $3,603 USD

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
$4,387 USD