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Cushion|Natural|GIA

1.50ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 1559373415

Certificate GIA 1559373415

Diamond specifications and retailer prices

From £1,883 GBP
As of November 6, 2026
Save £2,284 GBP (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,167 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559373415. Listed at 12 retailers as of November 4, 2026, with prices from £1,883 to £4,167, a £2,284 spread on the same certified stone. MOH London lists it at £4,167. 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

1.50
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1559373415
Dimensions7.65 × 5.90 × 4.11 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Indented Natural
Top View
7.65 mm5.90 mm1.50 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 1559373415
Side View
Table 68.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 69.7%

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: £4,167 GBP|Low: £1,874 GBP|High: £4,255 GBP|Avg: £2,620 GBP|-2.1%
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 10£1,883 GBP
Retailer 2£1,990 GBP
Retailer 7£2,223 GBP
Retailer 4£2,490 GBP
Retailer 3£2,514 GBP
Retailer 8£2,587 GBP
Retailer 11£2,606 GBP
Retailer 6£2,619 GBP
Retailer 9£2,667 GBP
Retailer 5£2,908 GBP
MOH London£4,167 GBP

28 data points across 11 retailers

12 retailers£1,883 GBP to £4,167 GBP

A
Cheapest Retailer
-
£1,883 GBP
A
Retailer 2
-
£1,990 GBP
View
A
Retailer 3
-
£2,223 GBP
View
B+
Retailer 4
-
£2,340 GBP
View
B+
Retailer 5
-
£2,490 GBP
View
Retailer 6
-
£2,514 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£2,587 GBP
View
B+
Retailer 8
-
£2,606 GBP
View
B+
Retailer 9
-
£2,619 GBP
View
B+
Retailer 10
-
£2,667 GBP
View
B+
Retailer 11
-
£2,908 GBP
View
Most Expensive
B
MOH London
9336CC951 · Nov 4
£4,167 GBP
View
11 more retailers have this diamond
Prices start from £1,883 GBPSave up to £2,284 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
£1,883 GBP