Round|Natural|GIA

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 5503489142

Certificate GIA 5503489142

Diamond specifications and retailer prices

From $3,224 USD
As of November 1, 2026
Save $4,542 USD (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,766 USD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

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 5503489142. Listed at 16 retailers as of November 1, 2026, with prices from $3,224 to $7,766, a $4,542 spread on the same certified stone. Diamond Quarter lists it at $7,766. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5503489142
Dimensions6.81 × 6.78 × 4.22 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.81 mm6.78 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5503489142
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.1%

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 1
Current: $4,074 USD|Low: $2,793 USD|High: $6,983 USD|Avg: $4,549 USD|+2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 6$3,270 USD
Retailer 7$3,352 USD
Retailer 5$3,363 USD
Retailer 1$4,074 USD
Retailer 2$4,240 USD
Retailer 3$4,403 USD
Retailer 9$4,536 USD
Retailer 10$4,769 USD
Retailer 4$6,703 USD
Retailer 8$6,983 USD

34 data points across 10 retailers

16 retailers$3,224 USD to $7,766 USD

A
Cheapest Retailer
-
$3,224 USD
A
Retailer 2
-
$3,270 USD
View
B+
Retailer 3
-
$3,363 USD
View
Retailer 4
-
$3,631 USD
View
Price last confirmed 21 days ago
Retailer 5
-
$3,631 USD
View
Price last confirmed 17 days ago
Retailer 6
-
$3,771 USD
View
Price last confirmed 22 days ago
B+
Retailer 7
-
$4,074 USD
View
B+
Retailer 8
-
$4,110 USD
View
B+
Retailer 9
-
$4,110 USD
View
Retailer 10
-
$4,190 USD
View
Price last confirmed 19 days ago
B+
Retailer 11
-
$4,240 USD
View
B+
Retailer 12
-
$4,403 USD
View
Retailer 13
-
$4,536 USD
View
Price last confirmed 22 days ago
B
Retailer 14
-
$6,703 USD
View
Retailer 15
-
$6,983 USD
View
Price last confirmed 17 days ago
Most Expensive
B
Diamond Quarter
1.21SI2F55428241N · Nov 5
$7,766 USD
£6,115 GBP
View
15 more retailers have this diamond
Prices start from $3,224 USDSave up to $4,542 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
$3,224 USD