Round|Natural|GIA

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 2557099524

Certificate GIA 2557099524

Diamond specifications and retailer prices

From $2,240 USD
As of November 6, 2026
Save $2,693 USD (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $6,231 USD 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
Color
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: $2,333 USD|Low: $2,227 USD|High: $5,044 USD|Avg: $3,083 USD|-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$2,240 USD
Retailer 1$2,333 USD
Retailer 7$2,617 USD
Retailer 10$2,718 USD
Retailer 2$2,723 USD
Retailer 3$2,981 USD
Retailer 9$3,064 USD
Retailer 5$3,104 USD
Retailer 4$3,122 USD
Retailer 6$3,427 USD
Retailer 8$4,933 USD

38 data points across 11 retailers

17 retailers$2,240 USD to $4,933 USD

A
Cheapest Retailer
-
$2,240 USD
A
Retailer 2
-
$2,333 USD
View
A
Retailer 3
-
$2,617 USD
View
A
Retailer 4
-
$2,718 USD
View
A
Retailer 5
-
$2,723 USD
View
Final sale: no returns
A
Retailer 6
-
$2,778 USD
View
Retailer 7
-
$2,981 USD
View
Price last confirmed 43 days ago
Retailer 8
-
$2,981 USD
View
Price last confirmed 17 days ago
Retailer 9
-
$2,981 USD
View
Price last confirmed 21 days ago
A
Retailer 10
-
$3,064 USD
View
A
Retailer 11
-
$3,104 USD
View
B+
Retailer 12
-
$3,122 USD
View
B+
Retailer 13
-
$3,427 USD
View
Retailer 14
-
$3,439 USD
View
Price last confirmed 45 days ago
B
Retailer 15
-
$4,933 USD
View
Retailer 16
-
$6,231 USD
View
Price last confirmed 42 days ago
Most Expensive
NZ Jewellers
7f9bf449-dab7-4491-b009-3dc9b40f010e · Oct 17
$6,231 USD
View
Price last confirmed 20 days ago
16 more retailers have this diamond
Prices start from $2,240 USDSave up to $2,693 USD

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
$2,240 USD