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Round|Natural|HRD

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • HRD 240000199388

Certificate HRD 240000199388

Diamond specifications and retailer prices

From £1,489 GBP
As of November 4, 2026
Save £1,957 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,446 GBP at NZ Jewellers · As of November 2, 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 240000199388. Listed at 14 retailers as of November 2, 2026, with prices from £1,489 to £3,446, a £1,957 spread on the same certified stone. NZ Jewellers lists it at £3,446. 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
FluorescenceStrong
Crown angle35.2°
Pavilion angle41.4°
OriginNatural
Grading LabHRD
CertificateHRD 240000199388
Dimensions6.75 × 6.71 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
The stone in accordance with the mentioned number has been identified as a natural gem diamond.
Top View
6.75 mm6.71 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateHRD 240000199388
Side View
Table 58.0%Crown 35.2°Girdle: MediumPavilion 41.4°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,446 GBP|Low: £1,394 GBP|High: £3,446 GBP|Avg: £1,989 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 4£1,489 GBP
Retailer 5£1,520 GBP
Retailer 7£1,570 GBP
Retailer 8£1,648 GBP
Retailer 10£1,648 GBP
Retailer 6£1,724 GBP
Retailer 9£1,901 GBP
Retailer 2£2,045 GBP
Retailer 3£2,879 GBP
NZ Jewellers£3,446 GBP

27 data points across 10 retailers

14 retailers£1,489 GBP to £3,446 GBP

A
Cheapest Retailer
-
£1,489 GBP
A
Retailer 2
-
£1,520 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,570 GBP
View
Retailer 4
-
£1,648 GBP
View
Price last confirmed 53 days ago
Retailer 5
-
£1,648 GBP
View
Price last confirmed 25 days ago
A
Retailer 6
-
£1,648 GBP
View
A
Retailer 7
-
£1,724 GBP
View
Retailer 8
-
£1,901 GBP
View
Price last confirmed 53 days ago
A
Retailer 9
-
£1,901 GBP
View
A
Retailer 10
-
£2,045 GBP
View
B+
Retailer 11
-
£2,879 GBP
View
B
Retailer 12
-
£3,236 GBP
View
Retailer 13
-
£3,446 GBP
View
Price last confirmed 52 days ago
Most Expensive
B
NZ Jewellers
3400ff51-b38b-445a-a925-c9e3f6b5b1aa · Nov 2
£3,446 GBP
$4,612 USD
View
13 more retailers have this diamond
Prices start from £1,489 GBPSave up to £1,957 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.

A
1.21ct Round
£1,489 GBP