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Radiant|Natural|GIA

1.20ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 09

Certificate GIA 09

Diamond specifications and retailer prices

From $3,509 AUD
As of November 4, 2026
Save $5,078 AUD (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,587 AUD at NZ Jewellers · As of November 5, 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 I 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. Listed at 9 retailers as of November 4, 2026, with prices from $3,509 to $8,587, a $5,078 spread on the same certified stone. NZ Jewellers lists it at $8,587. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 09
Dimensions7.20 × 5.29 × 3.58 mm
L/W Ratio1.36
Top View
7.20 mm5.29 mm1.20 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 09
Side View
Table 65.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.6%

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: $8,587 AUD|Low: $3,432 AUD|High: $8,587 AUD|Avg: $4,683 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 4$3,509 AUD
Retailer 5$3,720 AUD
Retailer 2$3,855 AUD
Retailer 6$4,043 AUD
Retailer 3$4,253 AUD
NZ Jewellers$8,587 AUD

10 data points across 6 retailers

9 retailers$3,509 AUD to $8,587 AUD

A
Cheapest Retailer
-
$3,509 AUD
B+
Retailer 2
-
$3,720 AUD
View
Retailer 3
-
$3,720 AUD
View
Price last confirmed 31 days ago
B+
Retailer 4
-
$3,855 AUD
View
B+
Retailer 5
-
$4,043 AUD
View
B+
Retailer 6
-
$4,253 AUD
View
Retailer 7
-
$4,293 AUD
View
Price last confirmed 31 days ago
Retailer 8
-
$8,587 AUD
View
Price last confirmed 32 days ago
Most Expensive
B
NZ Jewellers
b3435741-727a-496b-a629-c26c56224afa · Nov 5
$8,587 AUD
$5,900 USD
View
8 more retailers have this diamond
Prices start from $3,509 AUDSave up to $5,078 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
$3,509 AUD