Radiant|Natural|GIA

1.23ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 2556124890

Certificate GIA 2556124890

Diamond specifications and retailer prices

From $3,279 NZD
As of November 4, 2026
Save $2,928 NZD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,666 NZD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.23ct natural radiant diamond

This 1.23ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556124890. Listed at 12 retailers as of November 4, 2026, with a 89% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556124890
Dimensions6.82 × 5.25 × 3.70 mm
L/W Ratio1.30
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle, Extra Facet
Top View
6.82 mm5.25 mm1.23 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556124890
Side View
Table 68.0%CrownGirdlePavilionCulet: NoneDepth 70.4%

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: $4,337 NZD|Low: $3,005 NZD|High: $6,299 NZD|Avg: $4,206 NZD|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 6$3,279 NZD
Retailer 5$3,418 NZD
Retailer 8$3,554 NZD
Retailer 9$3,554 NZD
Retailer 2$3,859 NZD
Retailer 1$4,337 NZD
Retailer 7$4,636 NZD
Retailer 4$4,831 NZD
Retailer 3$6,207 NZD

44 data points across 9 retailers

12 retailers$3,279 NZD to $6,207 NZD

A
Cheapest Retailer
-
$3,279 NZD
Final sale: no returns
A
Retailer 2
-
$3,418 NZD
View
Retailer 3
-
$3,554 NZD
View
Price last confirmed 30 days ago
Retailer 4
-
$3,554 NZD
View
Price last confirmed 30 days ago
Retailer 5
-
$3,718 NZD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$3,859 NZD
View
Retailer 7
-
$4,100 NZD
View
Price last confirmed 39 days ago
B+
Retailer 8
-
$4,337 NZD
View
Retailer 9
-
$4,636 NZD
View
Price last confirmed 33 days ago
B
Retailer 10
-
$4,831 NZD
View
B
Retailer 11
-
$6,207 NZD
View
Most Expensive
NZ Jewellers
052bd83d-df8d-4648-80e9-b4cec5a37c13 · Sep 30
$8,666 NZD
$4,804 USD
View
Price last confirmed 37 days ago
11 more retailers have this diamond
Prices start from $3,279 NZDSave up to $2,928 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 Radiant
$3,279 NZD