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1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 628465258

Shape and cutting style on the report: Round brilliant

Certificate IGI 628465258

Diamond specifications and retailer prices

From $1,857 SGD
As of November 6, 2026
Save $3,582 SGD (66%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,439 SGD 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 IGI 628465258. Listed at 14 retailers as of November 5, 2026, with prices from $1,857 to $5,439, a $3,582 spread on the same certified stone. NZ Jewellers lists it at $5,439. 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
FluorescenceNone
Crown angle35.6°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 628465258
Dimensions6.90 × 6.84 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.90 mm6.84 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 628465258
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,857 SGD|Low: $1,857 SGD|High: $4,612 SGD|Avg: $2,769 SGD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 1$1,857 SGD
Retailer 6$2,350 SGD
Retailer 7$2,377 SGD
Retailer 4$2,389 SGD
Retailer 8$2,400 SGD
Retailer 2$2,489 SGD
Retailer 3$3,168 SGD
Retailer 5$4,557 SGD

37 data points across 8 retailers

14 retailers$1,857 SGD to $5,439 SGD

A
Cheapest Retailer
-
$1,857 SGD
B+
Retailer 2
-
$2,350 SGD
View
A
Retailer 3
-
$2,377 SGD
View
A
Retailer 4
-
$2,389 SGD
View
B+
Retailer 5
-
$2,400 SGD
View
Final sale: no returns
A
Retailer 6
-
$2,489 SGD
View
Retailer 7
-
$2,602 SGD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,602 SGD
View
B+
Retailer 9
-
$2,722 SGD
View
B+
Retailer 10
-
$2,778 SGD
View
B+
Retailer 11
-
$3,002 SGD
View
B+
Retailer 12
-
$3,168 SGD
View
B
Retailer 13
-
$4,557 SGD
View
Most Expensive
B
NZ Jewellers
5ba006be-63d5-4d9e-a568-7e83ac34c81e · Nov 5
$5,439 SGD
$4,258 USD
View
13 more retailers have this diamond
Prices start from $1,857 SGDSave up to $3,582 SGD

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.

A
1.23ct Round
$1,857 SGD