CaratHunter
Plans
Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6345619250

Certificate GIA 6345619250

Diamond specifications and retailer prices

From $8,042 AUD
As of November 1, 2026
Save $5,566 AUD (41%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $13,608 AUD 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 $8,042 to $13,608, a $5,566 spread on the same certified stone. MOH London lists it at $13,608. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $13,608 AUD|Low: $7,881 AUD|High: $13,810 AUD|Avg: $9,742 AUD|+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$8,042 AUD
Retailer 8$8,077 AUD
Retailer 6$8,280 AUD
Retailer 9$8,861 AUD
Retailer 5$9,155 AUD
Retailer 7$9,261 AUD
Retailer 2$10,061 AUD
Retailer 10$10,838 AUD
Retailer 3$11,299 AUD
MOH London$13,608 AUD

37 data points across 10 retailers

8 retailers$8,042 AUD to $13,608 AUD

B+
Cheapest Retailer
-
$8,042 AUD
B+
Retailer 2
-
$8,077 AUD
View
B+
Retailer 3
-
$8,280 AUD
View
Retailer 4
-
$9,155 AUD
View
Price last confirmed 28 days ago
Retailer 5
-
$9,261 AUD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$10,061 AUD
View
B
Retailer 7
-
$11,299 AUD
View
Most Expensive
B
MOH London
F721B937A · Nov 4
$13,608 AUD
£7,501 GBP
View
7 more retailers have this diamond
Prices start from $8,042 AUDSave up to $5,566 AUD

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
$8,042 AUD