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Radiant|Natural|GIA

1.22ct J SI2 Radiant Natural Diamond

ID • J/SI2 • GIA 1242011830

Certificate GIA 1242011830

Diamond specifications and retailer prices

From £1,070 GBP
HK$11,200 HKD
As of October 31, 2026
Save £1,493 GBP (58%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,205 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.22ct natural radiant diamond

This 1.22ct 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 1242011830. Listed at 11 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

1.22
Carat
J
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242011830
Dimensions6.86 × 5.26 × 3.66 mm
L/W Ratio1.30
Girdle conditionPolished
Top View
6.86 mm5.26 mm1.22 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242011830
Side View
Table 68.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 69.6%

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: Oct 31
Current: £1,334 GBP|Low: £1,060 GBP|High: £2,766 GBP|Avg: £1,669 GBP|+14.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 3£1,070 GBP
Retailer 1£1,334 GBP
Retailer 7£1,366 GBP
Retailer 4£1,434 GBP
Retailer 10£1,488 GBP
Retailer 9£1,541 GBP
Retailer 2£1,556 GBP
Retailer 5£1,966 GBP
Retailer 8£2,216 GBP
Retailer 6£2,563 GBP

39 data points across 10 retailers

11 retailers£1,070 GBP to £2,563 GBP

A
Cheapest Retailer
-
£1,070 GBP
HK$11,200 HKD
B+
Retailer 2
-
£1,334 GBP
$1,788 USD
View
Final sale: no returns
A
Retailer 3
-
£1,366 GBP
$1,830 USD
View
A
Retailer 4
-
£1,434 GBP
View
Retailer 5
-
£1,488 GBP
SGD 2,695 SGD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£1,541 GBP
$2,065 USD
View
B+
Retailer 7
-
£1,556 GBP
A$3,208 AUD
View
B+
Retailer 8
-
£1,966 GBP
€2,509 EUR
View
Retailer 9
-
£2,216 GBP
$2,969 USD
View
Price last confirmed 8 days ago
B
Retailer 10
-
£2,563 GBP
View
Most Expensive
NZ Jewellers
58ab9090-570d-4dea-846e-9cbc3aff401d · Sep 30
£3,205 GBP
$4,295 USD
View
Price last confirmed 31 days ago
10 more retailers have this diamond
Prices start from £1,070 GBPSave up to £1,493 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
1.22ct Radiant
£1,070 GBP