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Round|Natural|GIA

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 2557099524

Certificate GIA 2557099524

Diamond specifications and retailer prices

From $3,260 AUD
As of November 6, 2026
Save $3,919 AUD (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $9,069 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557099524. Listed at 17 retailers as of November 2, 2026, with a 120% 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557099524
Dimensions6.79 × 6.84 × 4.16 mm
L/W Ratio1.01
Top View
6.79 mm6.84 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557099524
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,395 AUD|Low: $3,241 AUD|High: $7,341 AUD|Avg: $4,487 AUD|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$3,260 AUD
Retailer 1$3,395 AUD
Retailer 7$3,809 AUD
Retailer 10$3,956 AUD
Retailer 2$3,963 AUD
Retailer 3$4,339 AUD
Retailer 9$4,459 AUD
Retailer 5$4,518 AUD
Retailer 4$4,544 AUD
Retailer 6$4,988 AUD
Retailer 8$7,179 AUD

38 data points across 11 retailers

17 retailers$3,260 AUD to $7,179 AUD

A
Cheapest Retailer
-
$3,260 AUD
A
Retailer 2
-
$3,395 AUD
View
A
Retailer 3
-
$3,809 AUD
View
A
Retailer 4
-
$3,956 AUD
View
A
Retailer 5
-
$3,963 AUD
View
Final sale: no returns
A
Retailer 6
-
$4,043 AUD
View
Retailer 7
-
$4,339 AUD
View
Price last confirmed 44 days ago
Retailer 8
-
$4,339 AUD
View
Price last confirmed 18 days ago
Retailer 9
-
$4,339 AUD
View
Price last confirmed 22 days ago
A
Retailer 10
-
$4,459 AUD
View
A
Retailer 11
-
$4,518 AUD
View
B+
Retailer 12
-
$4,544 AUD
View
B+
Retailer 13
-
$4,988 AUD
View
Retailer 14
-
$5,005 AUD
View
Price last confirmed 46 days ago
B
Retailer 15
-
$7,179 AUD
View
Retailer 16
-
$9,069 AUD
View
Price last confirmed 43 days ago
Most Expensive
NZ Jewellers
7f9bf449-dab7-4491-b009-3dc9b40f010e · Oct 17
$9,069 AUD
$6,231 USD
View
Price last confirmed 20 days ago
16 more retailers have this diamond
Prices start from $3,260 AUDSave up to $3,919 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 Round
$3,260 AUD