CaratHunter
Plans
Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

GD • F/SI1 • GIA 1555552860

Certificate GIA 1555552860

Diamond specifications and retailer prices

From £2,419 GBP
As of November 4, 2026
Save £2,936 GBP (55%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,355 GBP at MOH London · As of November 2, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1555552860. Listed at 19 retailers as of November 2, 2026, with prices from £2,419 to £5,355, a £2,936 spread on the same certified stone. MOH London lists it at £5,355. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
F
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555552860
Dimensions7.35 × 5.50 × 3.68 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Cavity, Needle, Indented Natural
Top View
7.35 mm5.50 mm1.21 ctF / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555552860
Side View
Table 67.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £5,355 GBP|Low: £2,400 GBP|High: £5,362 GBP|Avg: £3,466 GBP|+0.6%
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
November 5, 2026
Retailer 14£2,419 GBP
Retailer 11£2,521 GBP
Retailer 5£2,868 GBP
Retailer 2£2,937 GBP
Retailer 4£2,955 GBP
Retailer 8£3,048 GBP
Retailer 12£3,123 GBP
Retailer 15£3,202 GBP
Retailer 9£3,243 GBP
Retailer 3£3,313 GBP
Retailer 7£3,384 GBP
Retailer 6£3,404 GBP
Retailer 10£3,609 GBP
Retailer 13£3,936 GBP
Retailer 16£5,219 GBP
MOH London£5,355 GBP

24 data points across 16 retailers

19 retailers£2,419 GBP to £5,355 GBP

B+
Cheapest Retailer
-
£2,419 GBP
B+
Retailer 2
-
£2,521 GBP
View
Retailer 3
-
£2,868 GBP
View
Price last confirmed 9 days ago
B
Retailer 4
-
£2,937 GBP
View
B
Retailer 5
-
£3,038 GBP
View
B
Retailer 6
-
£3,041 GBP
View
Retailer 7
-
£3,048 GBP
View
Price last confirmed 11 days ago
B
Retailer 8
-
£3,123 GBP
View
Retailer 9
-
£3,202 GBP
View
Price last confirmed 9 days ago
B
Retailer 10
-
£3,243 GBP
View
B
Retailer 11
-
£3,248 GBP
View
B
Retailer 12
-
£3,313 GBP
View
B
Retailer 13
-
£3,384 GBP
View
B
Retailer 14
-
£3,404 GBP
View
Retailer 15
-
£3,556 GBP
View
Price last confirmed 29 days ago
B
Retailer 16
-
£3,609 GBP
View
B
Retailer 17
-
£3,936 GBP
View
Retailer 18
-
£5,219 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
59AF216A7 · Nov 2
£5,355 GBP
View
18 more retailers have this diamond
Prices start from £2,419 GBPSave up to £2,936 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.

B+
1.21ct Cushion
£2,419 GBP