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Cushion|Natural|GIA

1.20ct E SI1 Cushion Natural Diamond

ID • E/SI1 • GIA 5553311990

Certificate GIA 5553311990

Diamond specifications and retailer prices

From £1,443 GBP
As of November 6, 2026
Save £1,902 GBP (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,346 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded E 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 5553311990. Listed at 16 retailers as of November 4, 2026, with prices from £1,443 to £3,346, a £1,902 spread on the same certified stone. MOH London lists it at £3,346. 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

1.20
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5553311990
Dimensions7.10 × 5.45 × 3.71 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Cavity, Needle
Top View
7.10 mm5.45 mm1.20 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 5553311990
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.0%

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: £3,346 GBP|Low: £1,425 GBP|High: £3,521 GBP|Avg: £2,056 GBP|-5.0%
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 11£1,443 GBP
Retailer 2£1,514 GBP
Retailer 9£1,753 GBP
Retailer 13£1,767 GBP
Retailer 4£1,797 GBP
Retailer 12£1,842 GBP
Retailer 5£1,986 GBP
Retailer 7£2,002 GBP
Retailer 10£2,025 GBP
Retailer 3£2,084 GBP
Retailer 8£2,336 GBP
Retailer 6£2,377 GBP
MOH London£3,346 GBP

29 data points across 13 retailers

16 retailers£1,443 GBP to £3,346 GBP

A
Cheapest Retailer
-
£1,443 GBP
A
Retailer 2
-
£1,514 GBP
View
A
Retailer 3
-
£1,753 GBP
View
A
Retailer 4
-
£1,767 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,797 GBP
View
A
Retailer 6
-
£1,842 GBP
View
A
Retailer 7
-
£1,862 GBP
View
Retailer 8
-
£1,986 GBP
View
Price last confirmed 21 days ago
A
Retailer 9
-
£2,002 GBP
View
B+
Retailer 10
-
£2,004 GBP
View
A
Retailer 11
-
£2,025 GBP
View
B+
Retailer 12
-
£2,084 GBP
View
Retailer 13
-
£2,240 GBP
View
Price last confirmed 30 days ago
B+
Retailer 14
-
£2,336 GBP
View
B+
Retailer 15
-
£2,377 GBP
View
Most Expensive
B
MOH London
D9C128CBD · Nov 4
£3,346 GBP
View
15 more retailers have this diamond
Prices start from £1,443 GBPSave up to £1,902 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
1.20ct Cushion
£1,443 GBP