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Radiant|Natural|GIA

1.23ct K SI1 Radiant Natural Diamond

GD • K/SI1 • GIA 2406024276

Certificate GIA 2406024276

Diamond specifications and retailer prices

From £1,855 GBP
As of November 4, 2026
Save £2,189 GBP (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,044 GBP at MOH London · As of November 2, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2406024276. Listed at 10 retailers as of November 2, 2026, with prices from £1,855 to £4,044, a £2,189 spread on the same certified stone. MOH London lists it at £4,044. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2406024276
Dimensions6.77 × 5.35 × 3.67 mm
L/W Ratio1.27
Top View
6.77 mm5.35 mm1.23 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2406024276
Side View
Table 66.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.5%

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 4
Current: £4,044 GBP|Low: £1,855 GBP|High: £4,092 GBP|Avg: £2,504 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 7£1,855 GBP
Retailer 6£1,925 GBP
Retailer 4£1,991 GBP
Retailer 5£2,365 GBP
Retailer 2£2,502 GBP
Retailer 3£2,814 GBP
MOH London£4,044 GBP

44 data points across 7 retailers

10 retailers£1,855 GBP to £4,044 GBP

B
Cheapest Retailer
-
£1,855 GBP
B
Retailer 2
-
£1,925 GBP
View
B
Retailer 3
-
£1,937 GBP
View
B
Retailer 4
-
£1,983 GBP
View
Retailer 5
-
£1,991 GBP
View
Price last confirmed 10 days ago
B
Retailer 6
-
£2,365 GBP
View
B
Retailer 7
-
£2,502 GBP
View
Retailer 8
-
£2,805 GBP
View
Price last confirmed 15 days ago
B
Retailer 9
-
£2,814 GBP
View
Most Expensive
C
MOH London
D65B8CD85 · Nov 2
£4,044 GBP
View
9 more retailers have this diamond
Prices start from £1,855 GBPSave up to £2,189 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
£1,855 GBP