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Radiant|Natural|GIA

1.21ct F SI2 Radiant Natural Diamond

ID • F/SI2 • GIA 1538184161

Certificate GIA 1538184161

Diamond specifications and retailer prices

From £1,778 GBP
As of November 2, 2026
Save £1,984 GBP (53%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,762 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 1538184161. Listed at 6 retailers as of November 2, 2026, with prices from £1,778 to £3,762, a £1,984 spread on the same certified stone. NZ Jewellers lists it at £3,762. 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
SymmetryExcellent
FluorescenceFaint
Crown angle48.74°
Pavilion angle31.51°
OriginNatural
Grading LabGIA
CertificateGIA 1538184161
Dimensions6.70 × 5.29 × 3.63 mm
L/W Ratio1.27
Girdle conditionVery Thick
Key to symbols
Cloud, Crystal, Feather, Cavity, Needle, Indented Natural
Top View
6.70 mm5.29 mm1.21 ctF / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1538184161
Side View
Table 66.0%Crown 48.74°Girdle: THK-VTKPavilion 31.51°Culet: NoneDepth 68.7%

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 2
Current: £3,762 GBP|Low: £1,778 GBP|High: £3,790 GBP|Avg: £2,311 GBP|-0.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 4£1,778 GBP
Retailer 5£1,799 GBP
Retailer 3£1,882 GBP
Retailer 6£1,906 GBP
Retailer 9£1,990 GBP
Retailer 7£2,098 GBP
Retailer 8£2,238 GBP
Retailer 2£3,136 GBP
NZ Jewellers£3,762 GBP

29 data points across 9 retailers

6 retailers£1,778 GBP to £3,762 GBP

A
Cheapest Retailer
-
£1,778 GBP
A
Retailer 2
-
£1,799 GBP
View
A
Retailer 3
-
£1,882 GBP
View
A
Retailer 4
-
£1,906 GBP
View
B+
Retailer 5
-
£3,136 GBP
View
Most Expensive
B
NZ Jewellers
cc3a81c0-08de-4887-bf65-230260d48f34 · Nov 3
£3,762 GBP
$5,035 USD
View
5 more retailers have this diamond
Prices start from £1,778 GBPSave up to £1,984 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
£1,778 GBP