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1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • HRD 240000194311

Shape and cutting style on the report: Round

Certificate HRD 240000194311

Diamond specifications and retailer prices

From £2,858 GBP
As of November 6, 2026
Save £2,801 GBP (49%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £5,659 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by HRD 240000194311. Listed at 10 retailers as of November 5, 2026, with prices from £2,858 to £5,659, a £2,801 spread on the same certified stone. NZ Jewellers lists it at £5,659. 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
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.8°
OriginNatural
Grading LabHRD
CertificateHRD 240000194311
Dimensions6.81 × 6.77 × 4.25 mm
L/W Ratio1.01
Top View
6.81 mm6.77 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 240000194311
Side View
Table 57.0%Crown 35.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.5%

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: £5,659 GBP|Low: £2,681 GBP|High: £5,659 GBP|Avg: £3,821 GBP|+2.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 10£2,858 GBP
Retailer 7£2,936 GBP
Retailer 6£2,998 GBP
Retailer 5£3,248 GBP
Retailer 9£3,248 GBP
Retailer 11£3,248 GBP
Retailer 2£3,648 GBP
Retailer 8£3,748 GBP
Retailer 4£5,160 GBP
Retailer 3£5,443 GBP
NZ Jewellers£5,659 GBP

29 data points across 11 retailers

10 retailers£2,858 GBP to £5,659 GBP

B+
Cheapest Retailer
-
£2,858 GBP
B+
Retailer 2
-
£2,936 GBP
View
B+
Retailer 3
-
£2,998 GBP
View
Final sale: no returns
B
Retailer 4
-
£3,248 GBP
View
Retailer 5
-
£3,248 GBP
View
Price last confirmed 8 days ago
B
Retailer 6
-
£3,248 GBP
View
B+
Retailer 7
-
£3,648 GBP
View
B
Retailer 8
-
£3,748 GBP
View
B
Retailer 9
-
£5,160 GBP
View
Most Expensive
B
NZ Jewellers
f8c4f8a5-1d45-437c-9044-d06df5801fa9 · Nov 5
£5,659 GBP
$7,575 USD
View
9 more retailers have this diamond
Prices start from £2,858 GBPSave up to £2,801 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 Round
£2,858 GBP