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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6552995220

Certificate GIA 6552995220

Diamond specifications and retailer prices

From £3,610 GBP
As of November 6, 2026
Save £2,170 GBP (38%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,780 GBP at MOH London · As of November 4, 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 6552995220. Listed at 8 retailers as of November 4, 2026, with prices from £3,610 to £5,780, a £2,170 spread on the same certified stone. MOH London lists it at £5,780. 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
OriginNatural
Grading LabGIA
CertificateGIA 6552995220
Dimensions6.78 × 6.83 × 4.29 mm
L/W Ratio1.01
Top View
6.78 mm6.83 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552995220
Side View
Table 57.0%CrownGirdlePavilionCulet: NoneDepth 63.0%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £5,780 GBP|Low: £2,035 GBP|High: £5,827 GBP|Avg: £3,381 GBP|+20.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6£2,035 GBP
Retailer 7£2,862 GBP
Retailer 8£3,020 GBP
Retailer 3£3,610 GBP
Retailer 5£3,841 GBP
Retailer 2£3,962 GBP
Retailer 4£4,549 GBP
MOH London£5,780 GBP

29 data points across 8 retailers

8 retailers£3,610 GBP to £5,780 GBP

Retailer 1
-
£2,035 GBP
Price last confirmed 29 days ago
Retailer 2
-
£2,862 GBP
View
Price last confirmed 30 days ago
Retailer 3
-
£3,020 GBP
View
Price last confirmed 33 days ago
B
Retailer 4
-
£3,610 GBP
View
B+
Retailer 5
-
£3,841 GBP
View
B+
Retailer 6
-
£3,962 GBP
View
B
Retailer 7
-
£4,549 GBP
View
Most Expensive
B
MOH London
B60E4151F · Nov 4
£5,780 GBP
View
7 more retailers have this diamond
Prices start from £3,610 GBPSave up to £2,170 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
£3,610 GBP