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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 £3,278 GBP
As of November 4, 2026
Save £2,692 GBP (45%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £5,969 GBP 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 £3,278 to £5,969, a £2,692 spread on the same certified stone. MOH London lists it at £5,969. 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
Colour
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: £5,969 GBP|Low: £3,198 GBP|High: £6,057 GBP|Avg: £4,069 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£3,254 GBP
Retailer 5£3,278 GBP
Retailer 3£3,381 GBP
Retailer 4£3,758 GBP
Retailer 2£4,229 GBP
Retailer 7£4,601 GBP
MOH London£5,969 GBP

27 data points across 7 retailers

5 retailers£3,278 GBP to £5,969 GBP

B+
Cheapest Retailer
-
£3,278 GBP
B+
Retailer 2
-
£3,381 GBP
View
Retailer 3
-
£3,758 GBP
View
Price last confirmed 9 days ago
B
Retailer 4
-
£4,229 GBP
View
Most Expensive
B
MOH London
1704B527F · Nov 4
£5,969 GBP
View
4 more retailers have this diamond
Prices start from £3,278 GBPSave up to £2,692 GBP

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
£3,278 GBP