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Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2558167281

Certificate GIA 2558167281

Diamond specifications and retailer prices

From $2,487 AUD
As of November 7, 2026
Save $3,826 AUD (61%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,314 AUD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct 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 2558167281. Listed at 8 retailers as of November 3, 2026, with prices from $2,487 to $6,314, a $3,826 spread on the same certified stone. NZ Jewellers lists it at $6,314. 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

1.21
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle54.67°
Pavilion angle36.44°
OriginNatural
Grading LabGIA
CertificateGIA 2558167281
Dimensions6.91 × 5.37 × 3.66 mm
L/W Ratio1.29
Top View
6.91 mm5.37 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2558167281
Side View
Table 71.0%Crown 54.67°Girdle: THK-VTKPavilion 36.44°Culet: NoneDepth 68.1%

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 7
Current: $6,314 AUD|Low: $2,397 AUD|High: $6,347 AUD|Avg: $3,396 AUD|-0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 3$2,487 AUD
Retailer 5$2,559 AUD
Retailer 6$2,589 AUD
Retailer 8$2,634 AUD
Retailer 2$2,707 AUD
Retailer 7$2,777 AUD
Retailer 4$4,535 AUD
NZ Jewellers$6,314 AUD

42 data points across 8 retailers

8 retailers$2,487 AUD to $6,314 AUD

A
Cheapest Retailer
-
$2,487 AUD
A
Retailer 2
-
$2,559 AUD
View
A
Retailer 3
-
$2,589 AUD
View
Retailer 4
-
$2,634 AUD
View
Price last confirmed 35 days ago
A
Retailer 5
-
$2,707 AUD
View
A
Retailer 6
-
$2,777 AUD
View
B+
Retailer 7
-
$4,535 AUD
View
Most Expensive
B
NZ Jewellers
3c79699f-d26b-4fe2-bbdd-c507cc815fd3 · Nov 3
$6,314 AUD
$4,338 USD
View
7 more retailers have this diamond
Prices start from $2,487 AUDSave up to $3,826 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
1.21ct Radiant
$2,487 AUD