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Radiant|Natural|GIA

1.21ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 1528227650

Certificate GIA 1528227650

Diamond specifications and retailer prices

From $3,783 AUD
As of November 6, 2026
Save $4,603 AUD (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,386 AUD at MOH London · As of November 7, 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528227650. Listed at 12 retailers as of November 6, 2026, with prices from $3,783 to $8,386, a $4,603 spread on the same certified stone. MOH London lists it at $8,386. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle31.98°
OriginNatural
Grading LabGIA
CertificateGIA 1528227650
Dimensions7.28 × 5.44 × 3.46 mm
L/W Ratio1.34
Girdle conditionThick
Key to symbols
Crystal, Feather, Needle
Top View
7.28 mm5.44 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528227650
Side View
Table 71.0%Crown 44.2°Girdle: STK-THKPavilion 31.98°Culet: NoneDepth 63.6%

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: $8,386 AUD|Low: $3,783 AUD|High: $10,141 AUD|Avg: $5,558 AUD|+16.9%
MOH London
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
November 7, 2026
Retailer 4$3,783 AUD
Retailer 15$3,978 AUD
Retailer 13$4,103 AUD
Retailer 5$4,192 AUD
Retailer 14$4,410 AUD
Retailer 7$4,794 AUD
Retailer 9$4,957 AUD
Retailer 8$5,290 AUD
Retailer 2$5,365 AUD
Retailer 10$5,376 AUD
Retailer 12$5,960 AUD
Retailer 11$6,012 AUD
Retailer 3$8,316 AUD
MOH London$8,386 AUD
Retailer 6$10,141 AUD

30 data points across 15 retailers

12 retailers$3,783 AUD to $8,386 AUD

A
Cheapest Retailer
-
$3,783 AUD
A
Retailer 2
-
$3,978 AUD
View
A
Retailer 3
-
$4,103 AUD
View
Final sale: no returns
Retailer 4
-
$4,192 AUD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$4,410 AUD
View
B+
Retailer 6
-
$4,957 AUD
View
B+
Retailer 7
-
$5,290 AUD
View
B
Retailer 8
-
$5,365 AUD
View
B
Retailer 9
-
$5,376 AUD
View
B
Retailer 10
-
$5,960 AUD
View
B
Retailer 11
-
$6,012 AUD
View
Most Expensive
B
MOH London
F612B9A96 · Nov 7
$8,386 AUD
£4,537 GBP
View
11 more retailers have this diamond
Prices start from $3,783 AUDSave up to $4,603 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
$3,783 AUD