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Radiant|Natural|GIA

1.21ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 1528227650

Certificate GIA 1528227650

Diamond specifications and retailer prices

From £1,942 GBP
As of November 6, 2026
Save £2,363 GBP (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,305 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528227650. Listed at 12 retailers as of November 6, 2026, with prices from £1,942 to £4,305, a £2,363 spread on the same certified stone. MOH London lists it at £4,305. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle31.98°
OriginNatural
Grading LabGIA
CertificateGIA 1528227650
Dimensions7.28 × 5.44 × 3.46 mm
L/W Ratio1.34
Girdle conditionThick
Key to symbols
Crystal, Feather, Needle
Top View
7.28 mm5.44 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528227650
Side View
Table 71.0%Crown 44.2°Girdle: STK-THKPavilion 31.98°Culet: NoneDepth 63.6%

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 6
Current: £4,305 GBP|Low: £1,942 GBP|High: £5,206 GBP|Avg: £2,853 GBP|+16.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 7, 2026
Retailer 4£1,942 GBP
Retailer 15£2,042 GBP
Retailer 13£2,106 GBP
Retailer 5£2,152 GBP
Retailer 14£2,264 GBP
Retailer 7£2,461 GBP
Retailer 9£2,545 GBP
Retailer 8£2,716 GBP
Retailer 2£2,754 GBP
Retailer 10£2,760 GBP
Retailer 12£3,059 GBP
Retailer 11£3,086 GBP
Retailer 3£4,269 GBP
MOH London£4,305 GBP
Retailer 6£5,206 GBP

30 data points across 15 retailers

12 retailers£1,942 GBP to £4,305 GBP

A
Cheapest Retailer
-
£1,942 GBP
A
Retailer 2
-
£2,042 GBP
View
A
Retailer 3
-
£2,106 GBP
View
Final sale: no returns
Retailer 4
-
£2,152 GBP
View
Price last confirmed 9 days ago
B+
Retailer 5
-
£2,264 GBP
View
B+
Retailer 6
-
£2,545 GBP
View
B+
Retailer 7
-
£2,716 GBP
View
B
Retailer 8
-
£2,754 GBP
View
B
Retailer 9
-
£2,760 GBP
View
B
Retailer 10
-
£3,059 GBP
View
B
Retailer 11
-
£3,086 GBP
View
Most Expensive
B
MOH London
F612B9A96 · Nov 7
£4,305 GBP
View
11 more retailers have this diamond
Prices start from £1,942 GBPSave up to £2,363 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 Radiant
£1,942 GBP