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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 $2,954 AUD
As of November 4, 2026
Save $2,759 AUD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,102 AUD 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,595 AUD|Low: $2,954 AUD|High: $6,022 AUD|Avg: $3,892 AUD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$2,954 AUD
Retailer 8$3,083 AUD
Retailer 7$3,282 AUD
Retailer 1$3,595 AUD
Retailer 3$3,752 AUD
Retailer 4$3,992 AUD
Retailer 2$4,053 AUD
Retailer 6$5,714 AUD

29 data points across 8 retailers

15 retailers$2,954 AUD to $5,714 AUD

A
Cheapest Retailer
-
$2,954 AUD
A
Retailer 2
-
$3,083 AUD
View
Retailer 3
-
$3,232 AUD
View
Price last confirmed 102 days ago
A
Retailer 4
-
$3,282 AUD
View
Retailer 5
-
$3,312 AUD
View
Price last confirmed 44 days ago
Retailer 6
-
$3,397 AUD
View
Price last confirmed 21 days ago
Retailer 7
-
$3,397 AUD
View
Price last confirmed 19 days ago
A
Retailer 8
-
$3,595 AUD
View
A
Retailer 9
-
$3,752 AUD
View
Retailer 10
-
$3,823 AUD
View
Price last confirmed 45 days ago
B+
Retailer 11
-
$3,992 AUD
View
B+
Retailer 12
-
$4,053 AUD
View
B
Retailer 13
-
$5,714 AUD
View
Retailer 14
-
$6,926 AUD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
7282c147-c874-492c-8544-55902c3b9aac · Oct 17
$7,102 AUD
$4,880 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $2,954 AUDSave up to $2,759 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.

A
1.23ct Round
$2,954 AUD