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Round|Natural|GIA

1.21ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 5136012626

Certificate GIA 5136012626

Diamond specifications and retailer prices

From $9,676 SGD
As of November 4, 2026
Save $3,981 SGD (29%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $19,329 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 5136012626. Listed at 18 retailers as of November 4, 2026, with a 41% 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5136012626
Dimensions6.92 × 6.91 × 4.20 mm
L/W Ratio1.00
Top View
6.92 mm6.91 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5136012626
Side View
Table 57.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 60.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $13,495 SGD|Low: $8,798 SGD|High: $21,116 SGD|Avg: $12,881 SGD|+5.7%
Retailer 1
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
Retailer 16
Retailer 17
November 5, 2026
Retailer 11$9,676 SGD
Retailer 3$9,914 SGD
Retailer 17$10,230 SGD
Retailer 9$10,558 SGD
Retailer 2$10,660 SGD
Retailer 13$10,926 SGD
Retailer 8$11,780 SGD
Retailer 6$11,836 SGD
Retailer 4$12,018 SGD
Retailer 5$12,919 SGD
Retailer 7$12,919 SGD
Retailer 16$13,003 SGD
Retailer 12$13,341 SGD
Retailer 1$13,495 SGD
Retailer 15$13,657 SGD
Retailer 10$17,016 SGD
Retailer 14$18,209 SGD

37 data points across 17 retailers

18 retailers$9,676 SGD to $13,657 SGD

B
Cheapest Retailer
-
$9,676 SGD
B
Retailer 2
-
$9,914 SGD
View
B
Retailer 3
-
$10,230 SGD
View
B
Retailer 4
-
$10,558 SGD
View
Final sale: no returns
B
Retailer 5
-
$10,660 SGD
View
Retailer 6
-
$10,926 SGD
View
Price last confirmed 8 days ago
Retailer 7
-
$11,780 SGD
View
Price last confirmed 15 days ago
B
Retailer 8
-
$11,836 SGD
View
B
Retailer 9
-
$12,018 SGD
View
B
Retailer 10
-
$12,919 SGD
View
B
Retailer 11
-
$12,919 SGD
View
B
Retailer 12
-
$13,003 SGD
View
B
Retailer 13
-
$13,341 SGD
View
B
Retailer 14
-
$13,495 SGD
View
B
Retailer 15
-
$13,657 SGD
View
Retailer 16
-
$17,016 SGD
View
Price under review
Retailer 17
-
$18,209 SGD
View
Price under review
Most Expensive
Diamond Quarter
1.21SI2F5126EA3DN · Nov 5
$19,329 SGD
£11,876 GBP
View
Price under review
17 more retailers have this diamond
Prices start from $9,676 SGDSave up to $3,981 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.

B
1.21ct Round
$9,676 SGD