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Radiant|Natural|GIA

1.21ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 2556502880

Certificate GIA 2556502880

Diamond specifications and retailer prices

From £927 GBP
HK$9,700 HKD
As of November 1, 2026
Save £1,298 GBP (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,249 GBP at NZ Jewellers · As of October 6, 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 J 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 2556502880. Listed at 9 retailers as of October 29, 2026, with a 140% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle57.56°
OriginNatural
Grading LabGIA
CertificateGIA 2556502880
Dimensions7.41 × 5.30 × 3.65 mm
L/W Ratio1.40
Key to symbols
Crystal, Cloud, Feather
Top View
7.41 mm5.30 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556502880
Side View
Table 61.0%CrownGirdle: ThickPavilion 57.56°Culet: NoneDepth 68.9%

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 1
Current: £927 GBP|Low: £917 GBP|High: £2,427 GBP|Avg: £1,561 GBP|-14.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 1£927 GBP
Retailer 4£1,307 GBP
Retailer 5£1,325 GBP
Retailer 6£1,454 GBP
Retailer 3£1,936 GBP
Retailer 2£2,225 GBP

25 data points across 6 retailers

9 retailers£927 GBP to £2,225 GBP

A
Cheapest Retailer
-
£927 GBP
HK$9,700 HKD
A
Retailer 2
-
£1,307 GBP
SGD 2,366 SGD
View
A
Retailer 3
-
£1,325 GBP
$1,775 USD
View
Final sale: no returns
Retailer 4
-
£1,332 GBP
$1,785 USD
View
Price last confirmed 25 days ago
Retailer 5
-
£1,411 GBP
$1,891 USD
View
Price last confirmed 32 days ago
B+
Retailer 6
-
£1,454 GBP
A$2,998 AUD
View
B+
Retailer 7
-
£1,936 GBP
€2,470 EUR
View
B
Retailer 8
-
£2,225 GBP
View
Most Expensive
NZ Jewellers
d6f8478e-c9f9-4db5-9966-67ece69127b4 · Oct 6
£3,249 GBP
$4,353 USD
View
Price last confirmed 26 days ago
8 more retailers have this diamond
Prices start from £927 GBPSave up to £1,298 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
£927 GBP