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Cushion|Natural|GIA

1.50ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 1553811142

Certificate GIA 1553811142

Diamond specifications and retailer prices

From £1,616 GBP
As of November 6, 2026
Save £885 GBP (35%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,639 GBP at MOH London · As of October 29, 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 1553811142. Listed at 12 retailers as of November 6, 2026, with a 55% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1553811142
Dimensions7.83 × 6.11 × 3.75 mm
L/W Ratio1.28
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Cavity, Feather, Indented Natural, Natural
Top View
7.83 mm6.11 mm1.50 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1553811142
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.4%

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: £3,639 GBP|Low: £1,616 GBP|High: £3,658 GBP|Avg: £2,250 GBP|-0.5%
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£1,616 GBP
Retailer 2£1,721 GBP
Retailer 7£1,913 GBP
Retailer 3£2,141 GBP
Retailer 10£2,164 GBP
Retailer 5£2,250 GBP
Retailer 6£2,262 GBP
Retailer 8£2,326 GBP
Retailer 4£2,501 GBP
MOH London£3,639 GBP

27 data points across 10 retailers

12 retailers£1,616 GBP to £2,501 GBP

A
Cheapest Retailer
-
£1,616 GBP
A
Retailer 2
-
£1,721 GBP
View
A
Retailer 3
-
£1,913 GBP
View
B+
Retailer 4
-
£2,031 GBP
View
A
Retailer 5
-
£2,141 GBP
View
B+
Retailer 6
-
£2,155 GBP
View
Retailer 7
-
£2,164 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,250 GBP
View
B+
Retailer 9
-
£2,262 GBP
View
B+
Retailer 10
-
£2,326 GBP
View
B+
Retailer 11
-
£2,501 GBP
View
Most Expensive
MOH London
1F22AD26A · Oct 29
£3,639 GBP
View
Price last confirmed 8 days ago
11 more retailers have this diamond
Prices start from £1,616 GBPSave up to £885 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
£1,616 GBP