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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 $1,706 NZD
As of November 6, 2026
Save $2,439 NZD (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,536 NZD 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: $5,536 NZD|Low: $1,706 NZD|High: $5,583 NZD|Avg: $2,897 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2$1,706 NZD
Retailer 6$2,096 NZD
Retailer 7$2,289 NZD
Retailer 9$2,289 NZD
Retailer 8$2,378 NZD
Retailer 5$2,619 NZD
Retailer 4$2,931 NZD
Retailer 3$4,145 NZD
NZ Jewellers$5,536 NZD

45 data points across 9 retailers

9 retailers$1,706 NZD to $4,145 NZD

A
Cheapest Retailer
-
$1,706 NZD
B+
Retailer 2
-
$2,096 NZD
View
Final sale: no returns
Retailer 3
-
$2,289 NZD
View
Price last confirmed 8 days ago
Retailer 4
-
$2,289 NZD
View
Price last confirmed 8 days ago
Retailer 5
-
$2,378 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$2,619 NZD
View
B+
Retailer 7
-
$2,931 NZD
View
B+
Retailer 8
-
$4,145 NZD
View
Most Expensive
NZ Jewellers
a6f3953e-8ddb-4263-b69d-8d53056e6f82 · Oct 30
$5,536 NZD
$3,069 USD
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from $1,706 NZDSave up to $2,439 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.

A
1.23ct Round
$1,706 NZD