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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 £1,463 GBP
As of November 6, 2026
Save £1,831 GBP (56%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,293 GBP 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 £1,463 to £3,293, a £1,831 spread on the same certified stone. MOH London lists it at £3,293. 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
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

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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: £3,293 GBP|Low: £1,443 GBP|High: £3,532 GBP|Avg: £2,015 GBP|-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£1,463 GBP
Retailer 5£1,575 GBP
Retailer 15£1,609 GBP
Retailer 6£1,610 GBP
Retailer 12£1,711 GBP
Retailer 10£1,724 GBP
Retailer 9£1,734 GBP
Retailer 17£1,755 GBP
Retailer 11£1,774 GBP
Retailer 18£1,823 GBP
Retailer 4£1,826 GBP
Retailer 8£1,844 GBP
Retailer 7£1,937 GBP
Retailer 2£1,994 GBP
Retailer 14£2,300 GBP
Retailer 13£2,340 GBP
Retailer 16£3,003 GBP
MOH London£3,293 GBP

23 data points across 18 retailers

21 retailers£1,463 GBP to £3,293 GBP

A
Cheapest Retailer
-
£1,463 GBP
A
Retailer 2
-
£1,575 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,609 GBP
View
A
Retailer 4
-
£1,610 GBP
View
A
Retailer 5
-
£1,711 GBP
View
A
Retailer 6
-
£1,724 GBP
View
A
Retailer 7
-
£1,734 GBP
View
A
Retailer 8
-
£1,755 GBP
View
A
Retailer 9
-
£1,774 GBP
View
A
Retailer 10
-
£1,823 GBP
View
A
Retailer 11
-
£1,826 GBP
View
A
Retailer 12
-
£1,844 GBP
View
A
Retailer 13
-
£1,937 GBP
View
Retailer 14
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£1,992 GBP
View
Price last confirmed 30 days ago
B+
Retailer 15
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£1,994 GBP
View
B+
Retailer 16
-
£2,028 GBP
View
Retailer 17
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£2,235 GBP
View
Price last confirmed 31 days ago
B+
Retailer 18
-
£2,300 GBP
View
B+
Retailer 19
-
£2,340 GBP
View
B+
Retailer 20
-
£3,003 GBP
View
Most Expensive
B
MOH London
6AB239AD3 · Nov 4
£3,293 GBP
View
20 more retailers have this diamond
Prices start from £1,463 GBPSave up to £1,831 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
£1,463 GBP