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Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2556551357

Certificate GIA 2556551357

Diamond specifications and retailer prices

From £1,913 GBP
As of November 6, 2026
Save £2,317 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,230 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two 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 2556551357. Listed at 14 retailers as of November 4, 2026, with prices from £1,913 to £4,230, a £2,317 spread on the same certified stone. MOH London lists it at £4,230. 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

1.50
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556551357
Dimensions8.26 × 5.54 × 3.93 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
8.26 mm5.54 mm1.50 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556551357
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 70.9%

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: £4,230 GBP|Low: £1,913 GBP|High: £4,291 GBP|Avg: £2,739 GBP|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9£1,913 GBP
Retailer 2£2,021 GBP
Retailer 6£2,258 GBP
Retailer 3£2,460 GBP
Retailer 7£2,626 GBP
Retailer 10£2,644 GBP
Retailer 8£2,725 GBP
Retailer 4£2,953 GBP
Retailer 5£3,095 GBP
MOH London£4,230 GBP

26 data points across 10 retailers

14 retailers£1,913 GBP to £4,230 GBP

A
Cheapest Retailer
-
£1,913 GBP
A
Retailer 2
-
£2,021 GBP
View
B+
Retailer 3
-
£2,258 GBP
View
B+
Retailer 4
-
£2,377 GBP
View
B+
Retailer 5
-
£2,380 GBP
View
B+
Retailer 6
-
£2,460 GBP
View
B+
Retailer 7
-
£2,519 GBP
View
Retailer 8
-
£2,552 GBP
View
Price last confirmed 21 days ago
B+
Retailer 9
-
£2,626 GBP
View
B+
Retailer 10
-
£2,644 GBP
View
B+
Retailer 11
-
£2,725 GBP
View
B+
Retailer 12
-
£2,953 GBP
View
B
Retailer 13
-
£3,095 GBP
View
Most Expensive
B
MOH London
B558C4967 · Nov 4
£4,230 GBP
View
13 more retailers have this diamond
Prices start from £1,913 GBPSave up to £2,317 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
1.50ct Cushion
£1,913 GBP