Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6552995220

Certificate GIA 6552995220

Diamond specifications and retailer prices

From $4,859 USD
As of November 6, 2026
Save $2,921 USD (38%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,780 USD 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 $4,859 to $7,780, a $2,921 spread on the same certified stone. MOH London lists it at $7,780. 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
Color
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: $7,780 USD|Low: $2,739 USD|High: $7,842 USD|Avg: $4,551 USD|+20.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$2,739 USD
Retailer 7$3,852 USD
Retailer 8$4,065 USD
Retailer 3$4,859 USD
Retailer 5$5,169 USD
Retailer 2$5,332 USD
Retailer 4$6,122 USD
MOH London$7,780 USD

29 data points across 8 retailers

8 retailers$4,859 USD to $7,780 USD

Retailer 1
-
$2,739 USD
Price last confirmed 29 days ago
Retailer 2
-
$3,852 USD
View
Price last confirmed 30 days ago
Retailer 3
-
$4,065 USD
View
Price last confirmed 33 days ago
B
Retailer 4
-
$4,859 USD
View
B+
Retailer 5
-
$5,169 USD
View
B+
Retailer 6
-
$5,332 USD
View
B
Retailer 7
-
$6,122 USD
View
Most Expensive
B
MOH London
B60E4151F · Nov 4
$7,780 USD
£6,126 GBP
View
7 more retailers have this diamond
Prices start from $4,859 USDSave up to $2,921 USD

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
$4,859 USD