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1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 5503489142

Certificate GIA 5503489142

Diamond specifications and retailer prices

From $4,132 SGD
As of November 1, 2026
Save $5,821 SGD (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,953 SGD 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 $4,132 to $9,953, a $5,821 spread on the same certified stone. Diamond Quarter lists it at $9,953. 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
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: $5,221 SGD|Low: $3,580 SGD|High: $8,949 SGD|Avg: $5,830 SGD|+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$4,191 SGD
Retailer 7$4,296 SGD
Retailer 5$4,310 SGD
Retailer 1$5,221 SGD
Retailer 2$5,434 SGD
Retailer 3$5,643 SGD
Retailer 9$5,813 SGD
Retailer 10$6,112 SGD
Retailer 4$8,591 SGD
Retailer 8$8,949 SGD

34 data points across 10 retailers

16 retailers$4,132 SGD to $9,953 SGD

A
Cheapest Retailer
-
$4,132 SGD
A
Retailer 2
-
$4,191 SGD
View
B+
Retailer 3
-
$4,310 SGD
View
Retailer 4
-
$4,653 SGD
View
Price last confirmed 21 days ago
Retailer 5
-
$4,653 SGD
View
Price last confirmed 17 days ago
Retailer 6
-
$4,833 SGD
View
Price last confirmed 22 days ago
B+
Retailer 7
-
$5,221 SGD
View
B+
Retailer 8
-
$5,267 SGD
View
B+
Retailer 9
-
$5,267 SGD
View
Retailer 10
-
$5,370 SGD
View
Price last confirmed 19 days ago
B+
Retailer 11
-
$5,434 SGD
View
B+
Retailer 12
-
$5,643 SGD
View
Retailer 13
-
$5,813 SGD
View
Price last confirmed 22 days ago
B
Retailer 14
-
$8,591 SGD
View
Retailer 15
-
$8,949 SGD
View
Price last confirmed 17 days ago
Most Expensive
B
Diamond Quarter
1.21SI2F55428241N · Nov 5
$9,953 SGD
£6,115 GBP
View
15 more retailers have this diamond
Prices start from $4,132 SGDSave up to $5,821 SGD

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
$4,132 SGD