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Radiant|Natural|GIA

1.21ct F SI2 Radiant Natural Diamond

ID • F/SI2 • GIA 6535454075

Certificate GIA 6535454075

Diamond specifications and retailer prices

From £1,836 GBP
As of November 7, 2026
Save £2,283 GBP (55%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,120 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

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 6535454075. Listed at 7 retailers as of November 3, 2026, with prices from £1,836 to £4,120, a £2,283 spread on the same certified stone. NZ Jewellers lists it at £4,120. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle44.59°
Pavilion angle30.55°
OriginNatural
Grading LabGIA
CertificateGIA 6535454075
Dimensions7.07 × 5.31 × 3.48 mm
L/W Ratio1.33
Top View
7.07 mm5.31 mm1.21 ctF / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6535454075
Side View
Table 69.0%Crown 44.59°Girdle: ThickPavilion 30.55°Culet: NoneDepth 65.6%

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 7
Current: £4,120 GBP|Low: £1,797 GBP|High: £4,185 GBP|Avg: £2,538 GBP|-1.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 4£1,836 GBP
Retailer 5£1,948 GBP
Retailer 6£1,970 GBP
Retailer 3£2,046 GBP
Retailer 7£2,079 GBP
Retailer 2£3,434 GBP
NZ Jewellers£4,120 GBP

42 data points across 7 retailers

7 retailers£1,836 GBP to £4,120 GBP

A
Cheapest Retailer
-
£1,836 GBP
A
Retailer 2
-
£1,948 GBP
View
A
Retailer 3
-
£1,970 GBP
View
A
Retailer 4
-
£2,046 GBP
View
A
Retailer 5
-
£2,079 GBP
View
B
Retailer 6
-
£3,434 GBP
View
Most Expensive
B
NZ Jewellers
18e3931d-a2ec-49e6-b7f6-3e20b5d3d02a · Nov 3
£4,120 GBP
$5,514 USD
View
6 more retailers have this diamond
Prices start from £1,836 GBPSave up to £2,283 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
£1,836 GBP