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Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1242026926

Certificate GIA 1242026926

Diamond specifications and retailer prices

From $2,663 AUD
As of November 6, 2026
Save $3,659 AUD (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,523 AUD at NZ Jewellers · As of September 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242026926. Listed at 19 retailers as of November 4, 2026, with a 137% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242026926
Dimensions7.08 × 5.23 × 3.53 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.08 mm5.23 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242026926
Side View
Table 68.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.5%

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: $3,417 AUD|Low: $2,608 AUD|High: $6,431 AUD|Avg: $3,814 AUD|+0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 7, 2026
Retailer 3$2,663 AUD
Retailer 7$2,713 AUD
Retailer 12$2,918 AUD
Retailer 6$3,024 AUD
Retailer 11$3,122 AUD
Retailer 14$3,289 AUD
Retailer 15$3,318 AUD
Retailer 5$3,358 AUD
Retailer 1$3,417 AUD
Retailer 2$3,717 AUD
Retailer 9$4,416 AUD
Retailer 8$4,493 AUD
Retailer 4$5,036 AUD
Retailer 13$5,376 AUD
Retailer 10$6,322 AUD

31 data points across 15 retailers

19 retailers$2,663 AUD to $6,322 AUD

A
Cheapest Retailer
-
$2,663 AUD
A
Retailer 2
-
$2,713 AUD
View
A
Retailer 3
-
$2,918 AUD
View
B+
Retailer 4
-
$3,024 AUD
View
Final sale: no returns
B+
Retailer 5
-
$3,122 AUD
View
B+
Retailer 6
-
$3,289 AUD
View
B+
Retailer 7
-
$3,318 AUD
View
B+
Retailer 8
-
$3,358 AUD
View
B+
Retailer 9
-
$3,417 AUD
View
B+
Retailer 10
-
$3,592 AUD
View
Retailer 11
-
$3,614 AUD
View
Price last confirmed 37 days ago
B+
Retailer 12
-
$3,717 AUD
View
B
Retailer 13
-
$4,416 AUD
View
Retailer 14
-
$4,442 AUD
View
Price last confirmed 36 days ago
B
Retailer 15
-
$4,493 AUD
View
B
Retailer 16
-
$5,036 AUD
View
B
Retailer 17
-
$5,376 AUD
View
B
Retailer 18
-
$6,322 AUD
View
Most Expensive
NZ Jewellers
62ffbbde-18a4-4360-8d7e-35c1b4843a32 · Sep 30
$7,523 AUD
$5,169 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from $2,663 AUDSave up to $3,659 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
$2,663 AUD