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Radiant|Natural|GIA

1.21ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 5553821034

Certificate GIA 5553821034

Diamond specifications and retailer prices

From £1,935 GBP
As of November 4, 2026
Save £2,013 GBP (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,948 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 H 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 5553821034. Listed at 13 retailers as of November 4, 2026, with prices from £1,935 to £3,948, a £2,013 spread on the same certified stone. NZ Jewellers lists it at £3,948. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5553821034
Dimensions6.98 × 5.30 × 3.63 mm
L/W Ratio1.32
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
6.98 mm5.30 mm1.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5553821034
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.6%

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 4
Current: £3,948 GBP|Low: £1,935 GBP|High: £3,979 GBP|Avg: £2,541 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 4£1,935 GBP
Retailer 13£2,029 GBP
Retailer 5£2,092 GBP
Retailer 7£2,229 GBP
Retailer 9£2,266 GBP
Retailer 11£2,266 GBP
Retailer 2£2,353 GBP
Retailer 6£2,399 GBP
Retailer 3£2,481 GBP
Retailer 8£2,486 GBP
Retailer 10£2,615 GBP
Retailer 12£3,810 GBP
NZ Jewellers£3,948 GBP

29 data points across 13 retailers

13 retailers£1,935 GBP to £3,948 GBP

A
Cheapest Retailer
-
£1,935 GBP
B+
Retailer 2
-
£2,029 GBP
View
B+
Retailer 3
-
£2,092 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,229 GBP
View
Retailer 5
-
£2,266 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£2,266 GBP
View
B+
Retailer 7
-
£2,353 GBP
View
B+
Retailer 8
-
£2,399 GBP
View
B
Retailer 9
-
£2,481 GBP
View
B+
Retailer 10
-
£2,486 GBP
View
B+
Retailer 11
-
£2,615 GBP
View
Retailer 12
-
£3,810 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
NZ Jewellers
b4174110-3705-4efe-92d9-c6361fdc8e45 · Nov 5
£3,948 GBP
$5,285 USD
View
12 more retailers have this diamond
Prices start from £1,935 GBPSave up to £2,013 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
£1,935 GBP