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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2556361020

Certificate GIA 2556361020

Diamond specifications and retailer prices

From £2,170 GBP
As of November 6, 2026
Save £2,832 GBP (57%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £5,002 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 E 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 2556361020. Listed at 24 retailers as of November 5, 2026, with prices from £2,170 to £5,002, a £2,832 spread on the same certified stone. NZ Jewellers lists it at £5,002. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556361020
Dimensions7.05 × 5.43 × 3.73 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.05 mm5.43 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556361020
Side View
Table 68.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.7%

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: £5,002 GBP|Low: £2,152 GBP|High: £5,200 GBP|Avg: £3,183 GBP|-3.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 7, 2026
Retailer 3£2,170 GBP
Retailer 16£2,250 GBP
Retailer 12£2,578 GBP
Retailer 7£2,589 GBP
Retailer 10£2,649 GBP
Retailer 21£2,703 GBP
Retailer 18£2,730 GBP
Retailer 2£2,761 GBP
Retailer 17£2,784 GBP
Retailer 6£2,871 GBP
Retailer 11£2,871 GBP
Retailer 13£2,908 GBP
Retailer 5£2,980 GBP
Retailer 9£2,981 GBP
Retailer 14£3,067 GBP
Retailer 8£3,313 GBP
Retailer 15£3,313 GBP
Retailer 19£3,342 GBP
Retailer 20£3,504 GBP
Retailer 22£4,801 GBP
Retailer 4£4,943 GBP
NZ Jewellers£5,002 GBP

21 data points across 22 retailers

24 retailers£2,170 GBP to £5,002 GBP

A
Cheapest Retailer
-
£2,170 GBP
A
Retailer 2
-
£2,250 GBP
View
B+
Retailer 3
-
£2,578 GBP
View
B+
Retailer 4
-
£2,589 GBP
View
B+
Retailer 5
-
£2,649 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,703 GBP
View
B+
Retailer 7
-
£2,730 GBP
View
B+
Retailer 8
-
£2,761 GBP
View
B+
Retailer 9
-
£2,784 GBP
View
B+
Retailer 10
-
£2,820 GBP
View
Retailer 11
-
£2,871 GBP
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£2,871 GBP
View
B+
Retailer 13
-
£2,908 GBP
View
B+
Retailer 14
-
£2,976 GBP
View
B+
Retailer 15
-
£2,980 GBP
View
B+
Retailer 16
-
£2,981 GBP
View
B+
Retailer 17
-
£3,067 GBP
View
Retailer 18
-
£3,291 GBP
View
Price last confirmed 34 days ago
B+
Retailer 19
-
£3,313 GBP
View
B+
Retailer 20
-
£3,342 GBP
View
B+
Retailer 21
-
£3,504 GBP
View
B
Retailer 22
-
£4,801 GBP
View
Retailer 23
-
£4,943 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
NZ Jewellers
85eed898-47ab-4f27-9696-efb97d0955f7 · Nov 5
£5,002 GBP
$6,695 USD
View
23 more retailers have this diamond
Prices start from £2,170 GBPSave up to £2,832 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
£2,170 GBP