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Radiant|Natural|GIA

1.23ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 2556124890

Certificate GIA 2556124890

Diamond specifications and retailer prices

From $2,330 SGD
As of November 4, 2026
Save $2,080 SGD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,157 SGD 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: $3,081 SGD|Low: $2,135 SGD|High: $4,475 SGD|Avg: $2,989 SGD|+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$2,330 SGD
Retailer 5$2,429 SGD
Retailer 8$2,525 SGD
Retailer 9$2,525 SGD
Retailer 2$2,741 SGD
Retailer 1$3,081 SGD
Retailer 7$3,294 SGD
Retailer 4$3,432 SGD
Retailer 3$4,410 SGD

44 data points across 9 retailers

12 retailers$2,330 SGD to $4,410 SGD

A
Cheapest Retailer
-
$2,330 SGD
Final sale: no returns
A
Retailer 2
-
$2,429 SGD
View
Retailer 3
-
$2,525 SGD
View
Price last confirmed 30 days ago
Retailer 4
-
$2,525 SGD
View
Price last confirmed 30 days ago
Retailer 5
-
$2,641 SGD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$2,741 SGD
View
Retailer 7
-
$2,913 SGD
View
Price last confirmed 39 days ago
B+
Retailer 8
-
$3,081 SGD
View
Retailer 9
-
$3,294 SGD
View
Price last confirmed 33 days ago
B
Retailer 10
-
$3,432 SGD
View
B
Retailer 11
-
$4,410 SGD
View
Most Expensive
NZ Jewellers
052bd83d-df8d-4648-80e9-b4cec5a37c13 · Sep 30
$6,157 SGD
$4,804 USD
View
Price last confirmed 37 days ago
11 more retailers have this diamond
Prices start from $2,330 SGDSave up to $2,080 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 Radiant
$2,330 SGD