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Radiant|Natural|GIA

1.20ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 2458689031

Certificate GIA 2458689031

Diamond specifications and retailer prices

From $1,651 AUD
$1,157 USD
As of November 2, 2026
Save $1,625 AUD (50%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,362 AUD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2458689031. Listed at 7 retailers as of November 1, 2026, with a 98% 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

1.20
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2458689031
Dimensions6.56 × 5.24 × 3.61 mm
L/W Ratio1.25
Top View
6.56 mm5.24 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2458689031
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $2,041 AUD|Low: $1,316 AUD|High: $3,314 AUD|Avg: $2,055 AUD|+5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9$1,316 AUD
Retailer 4$1,651 AUD
Retailer 7$1,717 AUD
Retailer 5$1,788 AUD
Retailer 1$2,041 AUD
Retailer 8$2,128 AUD
Retailer 6$2,205 AUD
Retailer 3$2,498 AUD
Retailer 2$3,276 AUD

31 data points across 9 retailers

7 retailers$1,651 AUD to $3,276 AUD

A
Cheapest Retailer
-
$1,651 AUD
$1,157 USD
Final sale: no returns
Retailer 2
-
$1,788 AUD
$1,253 USD
View
Price last confirmed 41 days ago
B+
Retailer 3
-
$2,041 AUD
£1,127 GBP
View
Retailer 4
-
$2,063 AUD
$1,446 USD
View
Price last confirmed 39 days ago
B+
Retailer 5
-
$2,498 AUD
€1,667 EUR
View
B+
Retailer 6
-
$3,276 AUD
£1,808 GBP
View
Most Expensive
NZ Jewellers
9d061dce-021d-488f-8260-ce79ce014297 · Sep 20
$4,362 AUD
$3,057 USD
View
Price last confirmed 42 days ago
6 more retailers have this diamond
Prices start from $1,651 AUDSave up to $1,625 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
1.20ct Radiant
$1,651 AUD