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Round|Natural|GIA

1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 5553650322

Certificate GIA 5553650322

Diamond specifications and retailer prices

From $3,241 AUD
As of November 6, 2026
Save $5,819 AUD (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,060 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5553650322. Listed at 16 retailers as of November 5, 2026, with prices from $3,241 to $9,060, a $5,819 spread on the same certified stone. NZ Jewellers lists it at $9,060. 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5553650322
Dimensions6.81 × 6.85 × 4.25 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal
Top View
6.81 mm6.85 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5553650322
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°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 6
Current: $9,060 AUD|Low: $3,035 AUD|High: $9,060 AUD|Avg: $4,722 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 8$3,241 AUD
Retailer 3$3,470 AUD
Retailer 4$3,515 AUD
Retailer 10$3,622 AUD
Retailer 5$3,925 AUD
Retailer 12$4,077 AUD
Retailer 9$4,483 AUD
Retailer 13$4,483 AUD
Retailer 2$4,560 AUD
Retailer 11$4,628 AUD
Retailer 7$5,052 AUD
Retailer 6$7,226 AUD
NZ Jewellers$9,060 AUD

43 data points across 13 retailers

16 retailers$3,241 AUD to $9,060 AUD

B+
Cheapest Retailer
-
$3,241 AUD
B+
Retailer 2
-
$3,515 AUD
View
B+
Retailer 3
-
$3,622 AUD
View
Final sale: no returns
B+
Retailer 4
-
$3,687 AUD
View
Retailer 5
-
$3,925 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$3,925 AUD
View
B
Retailer 7
-
$4,077 AUD
View
B+
Retailer 8
-
$4,483 AUD
View
B+
Retailer 9
-
$4,483 AUD
View
B+
Retailer 10
-
$4,529 AUD
View
B+
Retailer 11
-
$4,560 AUD
View
B
Retailer 12
-
$4,628 AUD
View
Retailer 13
-
$5,030 AUD
View
Price last confirmed 14 days ago
B
Retailer 14
-
$5,052 AUD
View
B
Retailer 15
-
$7,226 AUD
View
Most Expensive
B
NZ Jewellers
cf5b448f-3b88-4520-b6d7-a4918f74acfe · Nov 5
$9,060 AUD
$6,225 USD
View
15 more retailers have this diamond
Prices start from $3,241 AUDSave up to $5,819 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
$3,241 AUD