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Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 2221947165

Certificate GIA 2221947165

Diamond specifications and retailer prices

From £2,815 GBP
As of November 6, 2026
Save £2,221 GBP (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,036 GBP at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2221947165. Listed at 6 retailers as of November 5, 2026, with prices from £2,815 to £5,036, a £2,221 spread on the same certified stone. NZ Jewellers lists it at £5,036. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle47°
Pavilion angle55.9°
OriginNatural
Grading LabGIA
CertificateGIA 2221947165
Dimensions7.48 × 5.45 × 3.63 mm
L/W Ratio1.37
Girdle conditionPolished
Key to symbols
Feather, Needle, Pinpoint
Top View
7.48 mm5.45 mm1.21 ctI / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2221947165
Side View
Table 67.0%Crown 47°Girdle: 3.2Pavilion 55.9°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,036 GBP|Low: £2,815 GBP|High: £5,036 GBP|Avg: £3,537 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3£2,815 GBP
Retailer 5£2,891 GBP
Retailer 6£2,917 GBP
Retailer 2£2,973 GBP
Retailer 4£4,841 GBP
NZ Jewellers£5,036 GBP

16 data points across 6 retailers

6 retailers£2,815 GBP to £5,036 GBP

B+
Cheapest Retailer
-
£2,815 GBP
B
Retailer 2
-
£2,891 GBP
View
B
Retailer 3
-
£2,917 GBP
View
B
Retailer 4
-
£2,973 GBP
View
Retailer 5
-
£4,841 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
NZ Jewellers
bf434a6d-53a7-4ea6-bba1-ea64f40fe78c · Nov 5
£5,036 GBP
$6,741 USD
View
5 more retailers have this diamond
Prices start from £2,815 GBPSave up to £2,221 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
£2,815 GBP