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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 $4,017 NZD
As of November 6, 2026
Save $7,212 NZD (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $11,229 NZD 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 $4,017 to $11,229, a $7,212 spread on the same certified stone. NZ Jewellers lists it at $11,229. 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: $11,229 NZD|Low: $3,761 NZD|High: $11,229 NZD|Avg: $5,853 NZD
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$4,017 NZD
Retailer 3$4,300 NZD
Retailer 4$4,356 NZD
Retailer 10$4,490 NZD
Retailer 5$4,865 NZD
Retailer 12$5,053 NZD
Retailer 9$5,556 NZD
Retailer 13$5,556 NZD
Retailer 2$5,652 NZD
Retailer 11$5,736 NZD
Retailer 7$6,261 NZD
Retailer 6$8,956 NZD
NZ Jewellers$11,229 NZD

43 data points across 13 retailers

16 retailers$4,017 NZD to $11,229 NZD

B+
Cheapest Retailer
-
$4,017 NZD
B+
Retailer 2
-
$4,356 NZD
View
B+
Retailer 3
-
$4,490 NZD
View
Final sale: no returns
B+
Retailer 4
-
$4,569 NZD
View
Retailer 5
-
$4,865 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$4,865 NZD
View
B
Retailer 7
-
$5,053 NZD
View
B+
Retailer 8
-
$5,556 NZD
View
B+
Retailer 9
-
$5,556 NZD
View
B+
Retailer 10
-
$5,614 NZD
View
B+
Retailer 11
-
$5,652 NZD
View
B
Retailer 12
-
$5,736 NZD
View
Retailer 13
-
$6,234 NZD
View
Price last confirmed 14 days ago
B
Retailer 14
-
$6,261 NZD
View
B
Retailer 15
-
$8,956 NZD
View
Most Expensive
B
NZ Jewellers
cf5b448f-3b88-4520-b6d7-a4918f74acfe · Nov 5
$11,229 NZD
$6,225 USD
View
15 more retailers have this diamond
Prices start from $4,017 NZDSave up to $7,212 NZD

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
$4,017 NZD