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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2556361020

Certificate GIA 2556361020

Diamond specifications and retailer prices

From $4,228 AUD
As of November 6, 2026
Save $5,516 AUD (57%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $9,744 AUD at NZ Jewellers · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556361020. Listed at 24 retailers as of November 5, 2026, with prices from $4,228 to $9,744, a $5,516 spread on the same certified stone. NZ Jewellers lists it at $9,744. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556361020
Dimensions7.05 × 5.43 × 3.73 mm
L/W Ratio1.30
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.05 mm5.43 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556361020
Side View
Table 68.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.7%

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: $9,744 AUD|Low: $4,192 AUD|High: $10,130 AUD|Avg: $6,200 AUD|-3.8%
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 7, 2026
Retailer 3$4,228 AUD
Retailer 16$4,382 AUD
Retailer 12$5,023 AUD
Retailer 7$5,043 AUD
Retailer 10$5,161 AUD
Retailer 21$5,266 AUD
Retailer 18$5,318 AUD
Retailer 2$5,378 AUD
Retailer 17$5,424 AUD
Retailer 6$5,593 AUD
Retailer 11$5,593 AUD
Retailer 13$5,664 AUD
Retailer 5$5,806 AUD
Retailer 9$5,807 AUD
Retailer 14$5,974 AUD
Retailer 8$6,453 AUD
Retailer 15$6,453 AUD
Retailer 19$6,510 AUD
Retailer 20$6,826 AUD
Retailer 22$9,352 AUD
Retailer 4$9,629 AUD
NZ Jewellers$9,744 AUD

21 data points across 22 retailers

24 retailers$4,228 AUD to $9,744 AUD

A
Cheapest Retailer
-
$4,228 AUD
A
Retailer 2
-
$4,382 AUD
View
B+
Retailer 3
-
$5,023 AUD
View
B+
Retailer 4
-
$5,043 AUD
View
B+
Retailer 5
-
$5,161 AUD
View
Final sale: no returns
B+
Retailer 6
-
$5,266 AUD
View
B+
Retailer 7
-
$5,318 AUD
View
B+
Retailer 8
-
$5,378 AUD
View
B+
Retailer 9
-
$5,424 AUD
View
B+
Retailer 10
-
$5,493 AUD
View
Retailer 11
-
$5,593 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$5,593 AUD
View
B+
Retailer 13
-
$5,664 AUD
View
B+
Retailer 14
-
$5,797 AUD
View
B+
Retailer 15
-
$5,806 AUD
View
B+
Retailer 16
-
$5,807 AUD
View
B+
Retailer 17
-
$5,974 AUD
View
Retailer 18
-
$6,411 AUD
View
Price last confirmed 34 days ago
B+
Retailer 19
-
$6,453 AUD
View
B+
Retailer 20
-
$6,510 AUD
View
B+
Retailer 21
-
$6,826 AUD
View
B
Retailer 22
-
$9,352 AUD
View
Retailer 23
-
$9,629 AUD
View
Price last confirmed 10 days ago
Most Expensive
B
NZ Jewellers
85eed898-47ab-4f27-9696-efb97d0955f7 · Nov 5
$9,744 AUD
$6,695 USD
View
23 more retailers have this diamond
Prices start from $4,228 AUDSave up to $5,516 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
$4,228 AUD