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Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 2231483721

Certificate GIA 2231483721

Diamond specifications and retailer prices

From $4,147 AUD
$2,906 USD
As of November 2, 2026
Save $4,566 AUD (52%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,713 AUD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2231483721. Listed at 15 retailers as of October 30, 2026, with prices from $4,147 to $8,713, a $4,566 spread on the same certified stone. NZ Jewellers lists it at $8,713. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2231483721
Dimensions6.94 × 5.28 × 3.69 mm
L/W Ratio1.31
Culet sizeNone
Top View
6.94 mm5.28 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2231483721
Side View
Table 68.0%CrownGirdle: VTK-VTKPavilionCulet: NoneDepth 70.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $8,713 AUD|Low: $4,147 AUD|High: $8,713 AUD|Avg: $5,517 AUD
NZ Jewellers
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
Retailer 16
November 2, 2026
Retailer 3$4,147 AUD
Retailer 13$4,530 AUD
Retailer 15$4,530 AUD
Retailer 4$4,558 AUD
Retailer 14$4,704 AUD
Retailer 6$4,743 AUD
Retailer 5$4,959 AUD
Retailer 9$5,227 AUD
Retailer 12$5,228 AUD
Retailer 7$5,271 AUD
Retailer 16$5,668 AUD
Retailer 8$5,690 AUD
Retailer 2$5,854 AUD
Retailer 11$6,147 AUD
Retailer 10$8,363 AUD
NZ Jewellers$8,713 AUD

18 data points across 16 retailers

15 retailers$4,147 AUD to $8,713 AUD

B+
Cheapest Retailer
-
$4,147 AUD
$2,906 USD
B+
Retailer 2
-
$4,530 AUD
$3,175 USD
View
B+
Retailer 3
-
$4,530 AUD
$3,175 USD
View
B
Retailer 4
-
$4,558 AUD
$3,194 USD
View
B
Retailer 5
-
$4,704 AUD
$3,297 USD
View
B
Retailer 6
-
$4,743 AUD
$3,324 USD
View
B+
Retailer 7
-
$4,959 AUD
CA$4,827 CAD
View
B
Retailer 8
-
$5,227 AUD
£2,884 GBP
View
B
Retailer 9
-
$5,228 AUD
$3,664 USD
View
B
Retailer 10
-
$5,271 AUD
$3,694 USD
View
Retailer 11
-
$5,668 AUD
$3,972 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
$5,854 AUD
€3,907 EUR
View
B
Retailer 13
-
$6,147 AUD
ZAR 69,598 ZAR
View
B
Retailer 14
-
$8,363 AUD
£4,615 GBP
View
Most Expensive
B
NZ Jewellers
304b2cca-abd9-424a-9469-a079e08a804e · Oct 30
$8,713 AUD
$6,106 USD
View
14 more retailers have this diamond
Prices start from $4,147 AUDSave up to $4,566 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.

B+
1.21ct Radiant
$4,147 AUD