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Radiant|Natural|GIA

1.23ct J SI1 Radiant Natural Diamond

VG • J/SI1 • GIA 5221183892

Certificate GIA 5221183892

Diamond specifications and retailer prices

From £2,654 GBP
As of November 5, 2026
Save £1,855 GBP (41%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,510 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural radiant diamond

This 1.23ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5221183892. Listed at 7 retailers as of November 4, 2026, with prices from £2,654 to £4,510, a £1,855 spread on the same certified stone. MOH London lists it at £4,510. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5221183892
Dimensions6.30 × 5.59 × 4.00 mm
L/W Ratio1.13
Top View
6.30 mm5.59 mm1.23 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 5221183892
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 71.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,510 GBP|Low: £2,654 GBP|High: £4,576 GBP|Avg: £3,132 GBP|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 4£2,654 GBP
Retailer 5£2,802 GBP
Retailer 6£2,802 GBP
Retailer 2£2,825 GBP
Retailer 3£3,148 GBP
MOH London£4,510 GBP

43 data points across 6 retailers

7 retailers£2,654 GBP to £4,510 GBP

B
Cheapest Retailer
-
£2,654 GBP
B
Retailer 2
-
£2,802 GBP
View
B
Retailer 3
-
£2,802 GBP
View
B
Retailer 4
-
£2,825 GBP
View
B
Retailer 5
-
£2,899 GBP
View
B
Retailer 6
-
£3,148 GBP
View
Most Expensive
C
MOH London
79FB9A471 · Nov 4
£4,510 GBP
View
6 more retailers have this diamond
Prices start from £2,654 GBPSave up to £1,855 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
1.23ct Radiant
£2,654 GBP