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Cushion|Natural|GIA

1.21ct F SI2 Cushion Natural Diamond

ID • F/SI2 • GIA 2557672350

Certificate GIA 2557672350

Diamond specifications and retailer prices

From £1,396 GBP
As of November 6, 2026
Save £1,842 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,113 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557672350. Listed at 14 retailers as of November 4, 2026, with a 132% 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557672350
Dimensions7.08 × 5.45 × 3.75 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Cloud, Natural
Top View
7.08 mm5.45 mm1.21 ctF / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2557672350
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,113 GBP|Low: £1,377 GBP|High: £4,170 GBP|Avg: £2,156 GBP|+1.6%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 10£1,396 GBP
Retailer 5£1,460 GBP
Retailer 8£1,686 GBP
Retailer 3£1,711 GBP
Retailer 12£1,854 GBP
Retailer 7£1,937 GBP
Retailer 11£1,958 GBP
Retailer 2£1,961 GBP
Retailer 4£2,017 GBP
Retailer 6£2,300 GBP
Retailer 9£3,238 GBP
Queensmith£4,113 GBP

29 data points across 12 retailers

14 retailers£1,396 GBP to £3,238 GBP

A
Cheapest Retailer
-
£1,396 GBP
A
Retailer 2
-
£1,460 GBP
View
A
Retailer 3
-
£1,686 GBP
View
A
Retailer 4
-
£1,711 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,791 GBP
View
Retailer 6
-
£1,854 GBP
View
Price last confirmed 9 days ago
A
Retailer 7
-
£1,937 GBP
View
B+
Retailer 8
-
£1,958 GBP
View
A
Retailer 9
-
£1,961 GBP
View
B+
Retailer 10
-
£2,004 GBP
View
B+
Retailer 11
-
£2,017 GBP
View
B+
Retailer 12
-
£2,300 GBP
View
B
Retailer 13
-
£3,238 GBP
View
Most Expensive
Queensmith
2557672350 · Oct 28
£4,113 GBP
View
Price last confirmed 9 days ago
13 more retailers have this diamond
Prices start from £1,396 GBPSave up to £1,842 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
£1,396 GBP