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Round|Natural|IGI

1.23ct J VS1 Round Natural Diamond

EX • J/VS1 • IGI 642405058

Shape and cutting style on the report: Round brilliant

Certificate IGI 642405058

Diamond specifications and retailer prices

From $2,593 SGD
As of November 4, 2026
Save $2,422 SGD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,233 SGD at NZ Jewellers · As of October 17, 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI 642405058. Listed at 15 retailers as of November 4, 2026, with a 93% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
J
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 642405058
Dimensions6.86 × 6.89 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.86 mm6.89 mm1.23 ctJ / VS1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 642405058
Side View
Table 56.0%Crown 34.1°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.0%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $3,155 SGD|Low: $2,593 SGD|High: $5,285 SGD|Avg: $3,416 SGD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$2,593 SGD
Retailer 8$2,705 SGD
Retailer 7$2,880 SGD
Retailer 1$3,155 SGD
Retailer 3$3,293 SGD
Retailer 4$3,504 SGD
Retailer 2$3,557 SGD
Retailer 6$5,015 SGD

29 data points across 8 retailers

15 retailers$2,593 SGD to $5,015 SGD

A
Cheapest Retailer
-
$2,593 SGD
A
Retailer 2
-
$2,705 SGD
View
Retailer 3
-
$2,837 SGD
View
Price last confirmed 102 days ago
A
Retailer 4
-
$2,880 SGD
View
Retailer 5
-
$2,907 SGD
View
Price last confirmed 44 days ago
Retailer 6
-
$2,981 SGD
View
Price last confirmed 21 days ago
Retailer 7
-
$2,981 SGD
View
Price last confirmed 19 days ago
A
Retailer 8
-
$3,155 SGD
View
A
Retailer 9
-
$3,293 SGD
View
Retailer 10
-
$3,355 SGD
View
Price last confirmed 45 days ago
B+
Retailer 11
-
$3,504 SGD
View
B+
Retailer 12
-
$3,557 SGD
View
B
Retailer 13
-
$5,015 SGD
View
Retailer 14
-
$6,079 SGD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
7282c147-c874-492c-8544-55902c3b9aac · Oct 17
$6,233 SGD
$4,880 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $2,593 SGDSave up to $2,422 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
$2,593 SGD