Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6411171191

Certificate GIA 6411171191

Diamond specifications and retailer prices

From $1,815 USD
As of November 6, 2026
Save $2,429 USD (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,244 USD at MOH London · As of November 7, 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 6411171191. Listed at 14 retailers as of November 6, 2026, with prices from $1,815 to $4,244, a $2,429 spread on the same certified stone. MOH London lists it at $4,244. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6411171191
Dimensions6.18 × 5.94 × 4.10 mm
L/W Ratio1.04
Top View
6.18 mm5.94 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6411171191
Side View
Table 65.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $4,244 USD|Low: $1,815 USD|High: $4,313 USD|Avg: $2,799 USD|-1.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3$1,815 USD
Retailer 9$1,817 USD
Retailer 4$2,362 USD
Retailer 2$2,577 USD
Retailer 8$2,765 USD
Retailer 10$2,797 USD
Retailer 6$2,972 USD
Retailer 5$3,025 USD
Retailer 7$3,548 USD
MOH London$4,244 USD

25 data points across 10 retailers

14 retailers$1,815 USD to $4,244 USD

A
Cheapest Retailer
-
$1,815 USD
A
Retailer 2
-
$1,817 USD
View
A
Retailer 3
-
$2,362 USD
View
A
Retailer 4
-
$2,468 USD
View
Retailer 5
-
$2,518 USD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$2,575 USD
View
A
Retailer 7
-
$2,577 USD
View
B+
Retailer 8
-
$2,718 USD
View
B+
Retailer 9
-
$2,765 USD
View
B+
Retailer 10
-
$2,972 USD
View
Retailer 11
-
$2,998 USD
View
Price last confirmed 31 days ago
B+
Retailer 12
-
$3,025 USD
View
B+
Retailer 13
-
$3,548 USD
View
Most Expensive
B
MOH London
63BA0D0F2 · Nov 7
$4,244 USD
£3,342 GBP
View
13 more retailers have this diamond
Prices start from $1,815 USDSave up to $2,429 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
$1,815 USD