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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1236874082

Certificate GIA 1236874082

Diamond specifications and retailer prices

From $6,114 AUD
As of November 3, 2026
Save $4,177 AUD (41%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $11,258 AUD at NZ Jewellers · As of September 28, 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 1236874082. Listed at 9 retailers as of November 2, 2026, with a 68% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1236874082
Dimensions6.81 × 6.85 × 4.28 mm
L/W Ratio1.01
Girdle conditionMedium
Key to symbols
Crystal, Feather, Needle
Top View
6.81 mm6.85 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236874082
Side View
Table 58.0%Crown 36°GirdlePavilion 41.2°CuletDepth 62.7%

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 3
Current: $6,217 AUD|Low: $6,114 AUD|High: $10,417 AUD|Avg: $7,304 AUD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4$6,114 AUD
Retailer 1$6,217 AUD
Retailer 3$6,514 AUD
Retailer 6$6,811 AUD
Retailer 5$6,905 AUD
Retailer 7$7,394 AUD
Retailer 2$10,291 AUD

34 data points across 7 retailers

9 retailers$6,114 AUD to $10,291 AUD

B+
Cheapest Retailer
-
$6,114 AUD
B+
Retailer 2
-
$6,217 AUD
View
Retailer 3
-
$6,463 AUD
View
Price last confirmed 44 days ago
Retailer 4
-
$6,463 AUD
View
Price last confirmed 29 days ago
Retailer 5
-
$6,463 AUD
View
Price last confirmed 38 days ago
Retailer 6
-
$6,514 AUD
View
Price last confirmed 28 days ago
B
Retailer 7
-
$10,291 AUD
View
Retailer 8
-
$11,258 AUD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
592b55dd-38c2-4ef5-bb14-41c224b1515c · Sep 28
$11,258 AUD
$7,881 USD
View
Price last confirmed 38 days ago
8 more retailers have this diamond
Prices start from $6,114 AUDSave up to $4,177 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
$6,114 AUD