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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6555373722

Certificate GIA 6555373722

Diamond specifications and retailer prices

From $1,958 USD
As of November 6, 2026
Save $2,450 USD (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $4,408 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555373722. Listed at 21 retailers as of November 4, 2026, with prices from $1,958 to $4,408, a $2,450 spread on the same certified stone. MOH London lists it at $4,408. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555373722
Dimensions6.26 × 6.00 × 4.00 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
6.26 mm6.00 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555373722
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.6%

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: $4,408 USD|Low: $1,932 USD|High: $4,728 USD|Avg: $2,696 USD|-6.8%
MOH London
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
Retailer 18
November 7, 2026
Retailer 3$1,958 USD
Retailer 5$2,108 USD
Retailer 15$2,153 USD
Retailer 6$2,155 USD
Retailer 12$2,290 USD
Retailer 10$2,308 USD
Retailer 9$2,321 USD
Retailer 17$2,349 USD
Retailer 11$2,374 USD
Retailer 18$2,440 USD
Retailer 4$2,444 USD
Retailer 8$2,468 USD
Retailer 7$2,592 USD
Retailer 2$2,669 USD
Retailer 14$3,079 USD
Retailer 13$3,132 USD
Retailer 16$4,019 USD
MOH London$4,408 USD

23 data points across 18 retailers

21 retailers$1,958 USD to $4,408 USD

A
Cheapest Retailer
-
$1,958 USD
A
Retailer 2
-
$2,108 USD
View
Final sale: no returns
A
Retailer 3
-
$2,153 USD
View
A
Retailer 4
-
$2,155 USD
View
A
Retailer 5
-
$2,290 USD
View
A
Retailer 6
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$2,308 USD
View
A
Retailer 7
-
$2,321 USD
View
A
Retailer 8
-
$2,349 USD
View
A
Retailer 9
-
$2,374 USD
View
A
Retailer 10
-
$2,440 USD
View
A
Retailer 11
-
$2,444 USD
View
A
Retailer 12
-
$2,468 USD
View
A
Retailer 13
-
$2,592 USD
View
Retailer 14
-
$2,666 USD
View
Price last confirmed 30 days ago
B+
Retailer 15
-
$2,669 USD
View
B+
Retailer 16
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$2,715 USD
View
Retailer 17
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$2,991 USD
View
Price last confirmed 31 days ago
B+
Retailer 18
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$3,079 USD
View
B+
Retailer 19
-
$3,132 USD
View
B+
Retailer 20
-
$4,019 USD
View
Most Expensive
B
MOH London
6AB239AD3 · Nov 4
$4,408 USD
£3,471 GBP
View
20 more retailers have this diamond
Prices start from $1,958 USDSave up to $2,450 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 Cushion
$1,958 USD