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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6555589674

Certificate GIA 6555589674

Diamond specifications and retailer prices

From £3,736 GBP
As of November 4, 2026
Save £2,939 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £6,675 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

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 6555589674. Listed at 13 retailers as of November 4, 2026, with prices from £3,736 to £6,675, a £2,939 spread on the same certified stone. Wholesale Diamonds Direct lists it at £6,675. 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
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6555589674
Dimensions6.82 × 6.86 × 4.28 mm
L/W Ratio1.01
Girdle conditionMedium
Key to symbols
Crystal, Twinning Wisp
Top View
6.82 mm6.86 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555589674
Side View
Table 56.0%Crown 36.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.5%

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 4
Current: £5,769 GBP|Low: £3,736 GBP|High: £6,675 GBP|Avg: £4,747 GBP|+3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
November 5, 2026
Retailer 2£3,736 GBP
Retailer 12£4,001 GBP
Retailer 4£4,287 GBP
Retailer 6£4,461 GBP
Retailer 10£4,476 GBP
Retailer 8£4,534 GBP
Retailer 5£4,711 GBP
Retailer 3£4,777 GBP
Retailer 7£4,777 GBP
Retailer 11£4,844 GBP
Retailer 9£4,941 GBP
Retailer 1£5,769 GBP
Wholesale Diamonds Direct£6,675 GBP

43 data points across 13 retailers

13 retailers£3,736 GBP to £6,675 GBP

B+
Cheapest Retailer
-
£3,736 GBP
B+
Retailer 2
-
£4,001 GBP
View
B+
Retailer 3
-
£4,287 GBP
View
B+
Retailer 4
-
£4,461 GBP
View
B
Retailer 5
-
£4,476 GBP
View
B
Retailer 6
-
£4,534 GBP
View
B
Retailer 7
-
£4,711 GBP
View
B
Retailer 8
-
£4,777 GBP
View
B
Retailer 9
-
£4,777 GBP
View
B
Retailer 10
-
£4,844 GBP
View
B
Retailer 11
-
£4,941 GBP
View
B
Retailer 12
-
£5,769 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
273575981 · Nov 4
£6,675 GBP
$8,984 USD
View
12 more retailers have this diamond
Prices start from £3,736 GBPSave up to £2,939 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
£3,736 GBP