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1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6345619250

Certificate GIA 6345619250

Diamond specifications and retailer prices

From $7,191 SGD
As of November 1, 2026
Save $4,977 SGD (41%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $12,168 SGD 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 6345619250. Listed at 8 retailers as of November 1, 2026, with prices from $7,191 to $12,168, a $4,977 spread on the same certified stone. MOH London lists it at $12,168. 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°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6345619250
Dimensions6.86 × 6.81 × 4.26 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.86 mm6.81 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6345619250
Side View
Table 57.0%Crown 36°Girdle: ThickPavilion 41°Culet: NoneDepth 62.3%

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 1
Current: $12,168 SGD|Low: $7,047 SGD|High: $12,348 SGD|Avg: $8,711 SGD|+2.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 4$7,191 SGD
Retailer 8$7,222 SGD
Retailer 6$7,403 SGD
Retailer 9$7,923 SGD
Retailer 5$8,186 SGD
Retailer 7$8,281 SGD
Retailer 2$8,996 SGD
Retailer 10$9,691 SGD
Retailer 3$10,103 SGD
MOH London$12,168 SGD

37 data points across 10 retailers

8 retailers$7,191 SGD to $12,168 SGD

B+
Cheapest Retailer
-
$7,191 SGD
B+
Retailer 2
-
$7,222 SGD
View
B+
Retailer 3
-
$7,403 SGD
View
Retailer 4
-
$8,186 SGD
View
Price last confirmed 28 days ago
Retailer 5
-
$8,281 SGD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$8,996 SGD
View
B
Retailer 7
-
$10,103 SGD
View
Most Expensive
B
MOH London
F721B937A · Nov 4
$12,168 SGD
£7,501 GBP
View
7 more retailers have this diamond
Prices start from $7,191 SGDSave up to $4,977 SGD

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
$7,191 SGD