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Round|Natural|HRD

1.23ct J SI2 Round Natural Diamond

GD • J/SI2 • HRD 250000178253

Certificate HRD 250000178253

Diamond specifications and retailer prices

From $1,377 AUD
As of November 6, 2026
Save $1,968 AUD (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $4,467 AUD at NZ Jewellers · As of October 30, 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 standard cut grade and certified by HRD 250000178253. Listed at 9 retailers as of November 4, 2026, with a 143% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
J
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle39.9°
Pavilion angle40.4°
OriginNatural
Grading LabHRD
CertificateHRD 250000178253
Dimensions6.58 × 6.51 × 4.32 mm
L/W Ratio1.01
Top View
6.58 mm6.51 mm1.23 ctJ / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateHRD 250000178253
Side View
Table 59.0%Crown 39.9°Girdle: Very ThickPavilion 40.4°Culet: NoneDepth 65.8%

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: $4,467 AUD|Low: $1,377 AUD|High: $4,504 AUD|Avg: $2,337 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2$1,377 AUD
Retailer 6$1,691 AUD
Retailer 7$1,847 AUD
Retailer 9$1,847 AUD
Retailer 8$1,918 AUD
Retailer 5$2,113 AUD
Retailer 4$2,365 AUD
Retailer 3$3,345 AUD
NZ Jewellers$4,467 AUD

45 data points across 9 retailers

9 retailers$1,377 AUD to $3,345 AUD

A
Cheapest Retailer
-
$1,377 AUD
B+
Retailer 2
-
$1,691 AUD
View
Final sale: no returns
Retailer 3
-
$1,847 AUD
View
Price last confirmed 8 days ago
Retailer 4
-
$1,847 AUD
View
Price last confirmed 8 days ago
Retailer 5
-
$1,918 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$2,113 AUD
View
B+
Retailer 7
-
$2,365 AUD
View
B+
Retailer 8
-
$3,345 AUD
View
Most Expensive
NZ Jewellers
a6f3953e-8ddb-4263-b69d-8d53056e6f82 · Oct 30
$4,467 AUD
$3,069 USD
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from $1,377 AUDSave up to $1,968 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
$1,377 AUD