CaratHunter
Plans
Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2557742575

Certificate GIA 2557742575

Diamond specifications and retailer prices

From $2,719 AUD
As of November 6, 2026
Save $3,799 AUD (58%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,798 AUD at NZ Jewellers · As of October 11, 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 2557742575. Listed at 12 retailers as of November 4, 2026, with a 140% 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557742575
Dimensions7.22 × 5.34 × 3.51 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.22 mm5.34 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557742575
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.7%

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: $7,798 AUD|Low: $2,701 AUD|High: $7,917 AUD|Avg: $4,306 AUD|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 9$2,719 AUD
Retailer 12$3,302 AUD
Retailer 11$3,442 AUD
Retailer 2$3,455 AUD
Retailer 5$3,668 AUD
Retailer 3$3,687 AUD
Retailer 6$3,787 AUD
Retailer 4$4,119 AUD
Retailer 7$4,401 AUD
Retailer 10$5,423 AUD
Retailer 8$6,517 AUD
NZ Jewellers$7,798 AUD

15 data points across 12 retailers

12 retailers$2,719 AUD to $6,517 AUD

A
Cheapest Retailer
-
$2,719 AUD
A
Retailer 2
-
$3,302 AUD
View
B+
Retailer 3
-
$3,442 AUD
View
Final sale: no returns
A
Retailer 4
-
$3,455 AUD
View
B+
Retailer 5
-
$3,668 AUD
View
B+
Retailer 6
-
$3,687 AUD
View
B+
Retailer 7
-
$3,787 AUD
View
B+
Retailer 8
-
$4,119 AUD
View
B+
Retailer 9
-
$4,401 AUD
View
B
Retailer 10
-
$5,423 AUD
View
B
Retailer 11
-
$6,517 AUD
View
Most Expensive
NZ Jewellers
538ffc4d-5d2d-4a9b-8e3d-4341c6573678 · Oct 11
$7,798 AUD
$5,358 USD
View
Price last confirmed 26 days ago
11 more retailers have this diamond
Prices start from $2,719 AUDSave up to $3,799 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
$2,719 AUD