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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6411171191

Certificate GIA 6411171191

Diamond specifications and retailer prices

From £1,356 GBP
As of November 6, 2026
Save £1,815 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,171 GBP 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 £1,356 to £3,171, a £1,815 spread on the same certified stone. MOH London lists it at £3,171. 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
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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £3,171 GBP|Low: £1,356 GBP|High: £3,222 GBP|Avg: £2,091 GBP|-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£1,356 GBP
Retailer 9£1,357 GBP
Retailer 4£1,765 GBP
Retailer 2£1,925 GBP
Retailer 8£2,066 GBP
Retailer 10£2,090 GBP
Retailer 6£2,220 GBP
Retailer 5£2,260 GBP
Retailer 7£2,651 GBP
MOH London£3,171 GBP

25 data points across 10 retailers

14 retailers£1,356 GBP to £3,171 GBP

A
Cheapest Retailer
-
£1,356 GBP
A
Retailer 2
-
£1,357 GBP
View
A
Retailer 3
-
£1,765 GBP
View
A
Retailer 4
-
£1,844 GBP
View
Retailer 5
-
£1,881 GBP
View
Price last confirmed 11 days ago
B+
Retailer 6
-
£1,924 GBP
View
A
Retailer 7
-
£1,925 GBP
View
B+
Retailer 8
-
£2,031 GBP
View
B+
Retailer 9
-
£2,066 GBP
View
B+
Retailer 10
-
£2,220 GBP
View
Retailer 11
-
£2,240 GBP
View
Price last confirmed 31 days ago
B+
Retailer 12
-
£2,260 GBP
View
B+
Retailer 13
-
£2,651 GBP
View
Most Expensive
B
MOH London
63BA0D0F2 · Nov 7
£3,171 GBP
View
13 more retailers have this diamond
Prices start from £1,356 GBPSave up to £1,815 GBP

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
£1,356 GBP