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1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 2126497381

Certificate GIA 2126497381

Diamond specifications and retailer prices

From £2,234 GBP
As of November 3, 2026
Save £5,798 GBP (72%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £8,031 GBP at Jared · As of November 6, 2026
View at Jared

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 GIA 2126497381. Listed at 13 retailers as of November 3, 2026, with prices from £2,234 to £8,031, a £5,798 spread on the same certified stone. Jared lists it at £8,031. 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2126497381
Dimensions6.86 × 6.82 × 4.22 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.86 mm6.82 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2126497381
Side View
Table 59.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 61.7%

Caratlytics Score

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

Price History

Last verified: Nov 3
Current: £8,031 GBP|Low: £2,234 GBP|High: £8,031 GBP|Avg: £6,077 GBP
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 6£2,234 GBP
Retailer 7£3,272 GBP
Retailer 9£5,789 GBP
Retailer 5£5,831 GBP
Retailer 12£5,981 GBP
Retailer 8£6,355 GBP
Retailer 11£6,379 GBP
Retailer 3£7,770 GBP
Retailer 4£7,770 GBP
Retailer 10£7,846 GBP
Retailer 2£7,852 GBP
Jared£8,031 GBP

33 data points across 12 retailers

13 retailers£2,234 GBP to £8,031 GBP

A
Cheapest Retailer
-
£2,234 GBP
B+
Retailer 2
-
£3,272 GBP
View
B
Retailer 3
-
£5,789 GBP
View
B
Retailer 4
-
£5,831 GBP
View
B
Retailer 5
-
£5,981 GBP
View
B
Retailer 6
-
£6,355 GBP
View
B
Retailer 7
-
£6,379 GBP
View
B
Retailer 8
-
£7,770 GBP
View
B
Retailer 9
-
£7,770 GBP
View
B
Retailer 10
-
£7,846 GBP
View
B
Retailer 11
-
£7,852 GBP
View
Most Expensive
B
Jared
128855742 · Nov 6
£8,031 GBP
$10,750 USD
View
11 more retailers have this diamond
Prices start from £2,234 GBPSave up to £5,798 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
£2,234 GBP