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1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6247074140

Certificate GIA 6247074140

Diamond specifications and retailer prices

From £3,299 GBP
As of November 1, 2026
Save £2,639 GBP (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,938 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6247074140. Listed at 6 retailers as of November 1, 2026, with prices from £3,299 to £5,938, a £2,639 spread on the same certified stone. MOH London lists it at £5,938. 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

1.23
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6247074140
Dimensions6.77 × 6.82 × 4.28 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
6.77 mm6.82 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6247074140
Side View
Table 57.0%Crown 35.5°Girdle: Sli. ThickPavilion 41°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £5,938 GBP|Low: £3,299 GBP|High: £6,499 GBP|Avg: £4,244 GBP|-7.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5£3,299 GBP
Retailer 4£3,355 GBP
Retailer 2£3,647 GBP
Retailer 6£4,003 GBP
Retailer 3£4,187 GBP
MOH London£5,938 GBP

42 data points across 6 retailers

6 retailers£3,299 GBP to £5,938 GBP

B+
Cheapest Retailer
-
£3,299 GBP
B+
Retailer 2
-
£3,355 GBP
View
B+
Retailer 3
-
£3,647 GBP
View
Retailer 4
-
£4,003 GBP
View
Price last confirmed 28 days ago
B+
Retailer 5
-
£4,187 GBP
View
Most Expensive
B
MOH London
6DEF767AC · Nov 2
£5,938 GBP
View
5 more retailers have this diamond
Prices start from £3,299 GBPSave up to £2,639 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 Round
£3,299 GBP