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Radiant|Natural|GIA

1.21ct F SI1 Radiant Natural Diamond

ID • F/SI1 • GIA 7552179432

Certificate GIA 7552179432

Diamond specifications and retailer prices

From £2,668 GBP
As of November 7, 2026
Save £2,149 GBP (45%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £4,817 GBP at MOH London · As of November 7, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7552179432. Listed at 4 retailers as of November 7, 2026, with prices from £2,668 to £4,817, a £2,149 spread on the same certified stone. MOH London lists it at £4,817. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle49.35°
Pavilion angle35.73°
OriginNatural
Grading LabGIA
CertificateGIA 7552179432
Dimensions6.98 × 5.38 × 3.64 mm
L/W Ratio1.30
Girdle conditionThick
Key to symbols
Crystal, Cloud, Needle
Top View
6.98 mm5.38 mm1.21 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7552179432
Side View
Table 70.0%Crown 49.35°Girdle: Slightly ThickPavilion 35.73°Culet: NoneDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 7
Current: £4,817 GBP|Low: £2,625 GBP|High: £4,926 GBP|Avg: £3,253 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 5£2,651 GBP
Retailer 2£2,668 GBP
Retailer 4£2,944 GBP
Retailer 3£3,118 GBP
MOH London£4,817 GBP

45 data points across 5 retailers

4 retailers£2,668 GBP to £4,817 GBP

B+
Cheapest Retailer
-
£2,668 GBP
Retailer 2
-
£2,944 GBP
View
Price last confirmed 34 days ago
Retailer 3
-
£3,118 GBP
View
Price last confirmed 30 days ago
Most Expensive
B
MOH London
90A26EE00 · Nov 7
£4,817 GBP
View
3 more retailers have this diamond
Prices start from £2,668 GBPSave up to £2,149 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
£2,668 GBP