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Cushion|Natural|GIA

1.21ct G SI1 Cushion Natural Diamond

VG • G/SI1 • GIA 3555391127

Certificate GIA 3555391127

Diamond specifications and retailer prices

From £3,121 GBP
As of November 4, 2026
Save £2,546 GBP (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £5,667 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 3555391127. Listed at 13 retailers as of November 4, 2026, with prices from £3,121 to £5,667, a £2,546 spread on the same certified stone. MOH London lists it at £5,667. 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
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555391127
Dimensions7.29 × 5.60 × 3.65 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Indented Natural, Needle
Top View
7.29 mm5.60 mm1.21 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555391127
Side View
Table 66.0%CrownGirdle: THN-THKPavilionCulet: NDepth 65.2%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £5,667 GBP|Low: £3,121 GBP|High: £5,683 GBP|Avg: £3,823 GBP|-0.3%
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
November 6, 2026
Retailer 9£3,121 GBP
Retailer 13£3,188 GBP
Retailer 10£3,236 GBP
Retailer 3£3,374 GBP
Retailer 11£3,444 GBP
Retailer 2£3,461 GBP
Retailer 8£3,602 GBP
Retailer 5£3,706 GBP
Retailer 4£3,768 GBP
Retailer 6£4,114 GBP
Retailer 7£4,460 GBP
Retailer 12£5,517 GBP
MOH London£5,667 GBP

38 data points across 13 retailers

13 retailers£3,121 GBP to £5,667 GBP

B
Cheapest Retailer
-
£3,121 GBP
B
Retailer 2
-
£3,188 GBP
View
B
Retailer 3
-
£3,236 GBP
View
B
Retailer 4
-
£3,374 GBP
View
Final sale: no returns
B
Retailer 5
-
£3,444 GBP
View
B
Retailer 6
-
£3,461 GBP
View
B
Retailer 7
-
£3,602 GBP
View
B
Retailer 8
-
£3,706 GBP
View
B
Retailer 9
-
£3,768 GBP
View
B
Retailer 10
-
£4,114 GBP
View
B
Retailer 11
-
£4,460 GBP
View
Retailer 12
-
£5,517 GBP
View
Price last confirmed 18 days ago
Most Expensive
B
MOH London
B59591D2B · Nov 4
£5,667 GBP
View
12 more retailers have this diamond
Prices start from £3,121 GBPSave up to £2,546 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
£3,121 GBP