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Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 3555518161

Certificate GIA 3555518161

Diamond specifications and retailer prices

From £1,635 GBP
As of November 6, 2026
Save £1,981 GBP (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,616 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 3555518161. Listed at 13 retailers as of November 4, 2026, with prices from £1,635 to £3,616, a £1,981 spread on the same certified stone. MOH London lists it at £3,616. 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
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 3555518161
Dimensions7.59 × 5.96 × 4.21 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural
Top View
7.59 mm5.96 mm1.50 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 3555518161
Side View
Table 67.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 70.6%

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: £3,616 GBP|Low: £1,616 GBP|High: £3,687 GBP|Avg: £2,319 GBP|-1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£1,635 GBP
Retailer 2£1,739 GBP
Retailer 6£1,917 GBP
Retailer 8£2,167 GBP
Retailer 9£2,270 GBP
Retailer 4£2,281 GBP
Retailer 10£2,361 GBP
Retailer 3£2,523 GBP
Retailer 5£2,646 GBP
MOH London£3,616 GBP

32 data points across 10 retailers

13 retailers£1,635 GBP to £3,616 GBP

A
Cheapest Retailer
-
£1,635 GBP
A
Retailer 2
-
£1,739 GBP
View
B+
Retailer 3
-
£1,917 GBP
View
B+
Retailer 4
-
£2,035 GBP
View
B+
Retailer 5
-
£2,036 GBP
View
B+
Retailer 6
-
£2,164 GBP
View
Retailer 7
-
£2,167 GBP
View
Price last confirmed 21 days ago
B+
Retailer 8
-
£2,270 GBP
View
B+
Retailer 9
-
£2,281 GBP
View
B+
Retailer 10
-
£2,361 GBP
View
B+
Retailer 11
-
£2,523 GBP
View
B+
Retailer 12
-
£2,646 GBP
View
Most Expensive
B
MOH London
94D18FCE6 · Nov 4
£3,616 GBP
View
12 more retailers have this diamond
Prices start from £1,635 GBPSave up to £1,981 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
£1,635 GBP