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Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 2558197624

Certificate GIA 2558197624

Diamond specifications and retailer prices

From $2,329 AUD
As of November 6, 2026
Save $3,124 AUD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,453 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded J 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 2558197624. Listed at 14 retailers as of November 2, 2026, with prices from $2,329 to $5,453, a $3,124 spread on the same certified stone. MOH London lists it at $5,453. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558197624
Dimensions7.23 × 5.56 × 3.78 mm
L/W Ratio1.30
Top View
7.23 mm5.56 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2558197624
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.0%

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: $5,453 AUD|Low: $2,329 AUD|High: $5,551 AUD|Avg: $3,429 AUD|-1.8%
MOH London
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 11$2,329 AUD
Retailer 5$2,447 AUD
Retailer 8$2,896 AUD
Retailer 3$3,131 AUD
Retailer 6$3,246 AUD
Retailer 10$3,260 AUD
Retailer 12$3,312 AUD
Retailer 2$3,379 AUD
Retailer 4$3,589 AUD
Retailer 9$3,797 AUD
Retailer 7$4,228 AUD
MOH London$5,453 AUD

30 data points across 12 retailers

14 retailers$2,329 AUD to $5,453 AUD

A
Cheapest Retailer
-
$2,329 AUD
A
Retailer 2
-
$2,447 AUD
View
B+
Retailer 3
-
$2,896 AUD
View
B+
Retailer 4
-
$2,950 AUD
View
Retailer 5
-
$3,131 AUD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$3,246 AUD
View
B+
Retailer 7
-
$3,260 AUD
View
B+
Retailer 8
-
$3,270 AUD
View
B+
Retailer 9
-
$3,312 AUD
View
B+
Retailer 10
-
$3,379 AUD
View
B
Retailer 11
-
$3,797 AUD
View
Retailer 12
-
$3,871 AUD
View
Price last confirmed 32 days ago
B
Retailer 13
-
$4,228 AUD
View
Most Expensive
B
MOH London
599C3FF43 · Nov 2
$5,453 AUD
£2,950 GBP
View
13 more retailers have this diamond
Prices start from $2,329 AUDSave up to $3,124 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
$2,329 AUD