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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 5506549779

Certificate GIA 5506549779

Diamond specifications and retailer prices

From $6,658 AUD
As of November 4, 2026
Save $6,113 AUD (48%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $12,771 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 5506549779. Listed at 16 retailers as of November 4, 2026, with prices from $6,658 to $12,771, a $6,113 spread on the same certified stone. NZ Jewellers lists it at $12,771. 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 angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5506549779
Dimensions6.86 × 6.80 × 4.31 mm
L/W Ratio1.01
Top View
6.86 mm6.80 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5506549779
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.0%

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: $8,117 AUD|Low: $6,658 AUD|High: $12,011 AUD|Avg: $8,174 AUD|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 6$6,658 AUD
Retailer 7$7,048 AUD
Retailer 3$7,125 AUD
Retailer 4$7,328 AUD
Retailer 9$7,635 AUD
Retailer 8$7,697 AUD
Retailer 1$8,117 AUD
Retailer 2$9,315 AUD
Retailer 5$11,837 AUD

38 data points across 9 retailers

16 retailers$6,658 AUD to $12,771 AUD

B+
Cheapest Retailer
-
$6,658 AUD
B+
Retailer 2
-
$7,048 AUD
View
Final sale: no returns
B+
Retailer 3
-
$7,125 AUD
View
B+
Retailer 4
-
$7,157 AUD
View
B+
Retailer 5
-
$7,328 AUD
View
B+
Retailer 6
-
$7,635 AUD
View
Retailer 7
-
$7,635 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$7,635 AUD
View
Retailer 9
-
$7,697 AUD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
$7,854 AUD
View
B+
Retailer 11
-
$8,117 AUD
View
B
Retailer 12
-
$8,811 AUD
View
B
Retailer 13
-
$9,315 AUD
View
B
Retailer 14
-
$11,837 AUD
View
B
Retailer 15
-
$12,622 AUD
View
Most Expensive
B
NZ Jewellers
1b6d518d-5cca-4551-b172-f30750849a94 · Nov 5
$12,771 AUD
$8,940 USD
View
15 more retailers have this diamond
Prices start from $6,658 AUDSave up to $6,113 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
$6,658 AUD