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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1555689564

Certificate GIA 1555689564

Diamond specifications and retailer prices

From £1,749 GBP
As of November 6, 2026
Save £1,673 GBP (49%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,422 GBP at MOH London · As of November 2, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555689564. Listed at 8 retailers as of November 2, 2026, with prices from £1,749 to £3,422, a £1,673 spread on the same certified stone. MOH London lists it at £3,422. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555689564
Dimensions7.26 × 5.38 × 3.70 mm
L/W Ratio1.35
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.26 mm5.38 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555689564
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.8%

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 6
Current: £3,422 GBP|Low: £1,323 GBP|High: £3,463 GBP|Avg: £1,865 GBP|+44.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3£1,323 GBP
Retailer 11£1,355 GBP
Retailer 10£1,481 GBP
Retailer 8£1,749 GBP
Retailer 6£1,847 GBP
Retailer 2£1,877 GBP
Retailer 7£1,931 GBP
Retailer 9£2,058 GBP
Retailer 4£2,190 GBP
Retailer 5£2,384 GBP
MOH London£3,422 GBP

34 data points across 11 retailers

8 retailers£1,749 GBP to £3,422 GBP

B+
Cheapest Retailer
-
£1,749 GBP
B+
Retailer 2
-
£1,847 GBP
View
B+
Retailer 3
-
£1,877 GBP
View
B
Retailer 4
-
£1,931 GBP
View
B
Retailer 5
-
£2,058 GBP
View
B
Retailer 6
-
£2,190 GBP
View
B
Retailer 7
-
£2,384 GBP
View
Most Expensive
B
MOH London
57F3EF09A · Nov 2
£3,422 GBP
View
7 more retailers have this diamond
Prices start from £1,749 GBPSave up to £1,673 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+
1.20ct Cushion
£1,749 GBP