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Cushion|Natural|GIA

1.28ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 7358737542

Certificate GIA 7358737542

Diamond specifications and retailer prices

From £2,013 GBP
As of November 4, 2026
Save £2,362 GBP (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,375 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.28ct natural cushion diamond

This 1.28ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 7358737542. Listed at 15 retailers as of November 4, 2026, with prices from £2,013 to £4,375, a £2,362 spread on the same certified stone. MOH London lists it at £4,375. 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

1.28
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 7358737542
Dimensions6.42 × 5.66 × 3.77 mm
L/W Ratio1.13
Top View
6.42 mm5.66 mm1.28 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 7358737542
Side View
Table 69.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 66.5%

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: £4,375 GBP|Low: £2,013 GBP|High: £4,440 GBP|Avg: £2,635 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
November 6, 2026
Retailer 3£2,013 GBP
Retailer 11£2,052 GBP
Retailer 7£2,066 GBP
Retailer 8£2,129 GBP
Retailer 9£2,232 GBP
Retailer 6£2,377 GBP
Retailer 10£2,556 GBP
Retailer 4£2,698 GBP
Retailer 2£2,880 GBP
Retailer 5£3,201 GBP
MOH London£4,375 GBP

44 data points across 11 retailers

15 retailers£2,013 GBP to £4,375 GBP

B+
Cheapest Retailer
-
£2,013 GBP
B+
Retailer 2
-
£2,052 GBP
View
B+
Retailer 3
-
£2,066 GBP
View
B+
Retailer 4
-
£2,102 GBP
View
B+
Retailer 5
-
£2,129 GBP
View
B
Retailer 6
-
£2,232 GBP
View
B
Retailer 7
-
£2,305 GBP
View
Retailer 8
-
£2,377 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£2,556 GBP
View
B
Retailer 10
-
£2,582 GBP
View
B
Retailer 11
-
£2,698 GBP
View
B
Retailer 12
-
£2,880 GBP
View
Retailer 13
-
£2,972 GBP
View
Price last confirmed 15 days ago
B
Retailer 14
-
£3,201 GBP
View
Most Expensive
C
MOH London
2DE41333E · Nov 4
£4,375 GBP
View
14 more retailers have this diamond
Prices start from £2,013 GBPSave up to £2,362 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+
1.28ct Cushion
£2,013 GBP