Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 5546558713

Certificate GIA 5546558713

Diamond specifications and retailer prices

From £1,315 GBP
As of November 6, 2026
Save £1,305 GBP (50%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,770 GBP at MOH London · As of October 21, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5546558713. Listed at 17 retailers as of November 6, 2026, with a 99% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Pavilion angle38.2°
OriginNatural
Grading LabGIA
CertificateGIA 5546558713
Dimensions7.63 × 6.09 × 4.19 mm
L/W Ratio1.25
Top View
7.63 mm6.09 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5546558713
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 38.2°Culet: NoneDepth 68.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £2,770 GBP|Low: £1,224 GBP|High: £3,144 GBP|Avg: £1,847 GBP|-11.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 5£1,224 GBP
Retailer 2£1,315 GBP
Retailer 3£1,387 GBP
Retailer 14£1,390 GBP
Retailer 16£1,483 GBP
Retailer 4£1,497 GBP
Retailer 6£1,524 GBP
Retailer 7£1,575 GBP
Retailer 10£1,724 GBP
Retailer 13£1,725 GBP
Retailer 8£1,805 GBP
Retailer 15£1,898 GBP
Retailer 11£2,136 GBP
Retailer 12£2,173 GBP
Retailer 9£2,620 GBP
MOH London£2,770 GBP

31 data points across 16 retailers

17 retailers£1,315 GBP to £2,620 GBP

Retailer 1
-
£1,224 GBP
Price last confirmed 7 days ago
A
Retailer 2
-
£1,315 GBP
View
Final sale: no returns
Retailer 3
-
£1,387 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£1,390 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£1,483 GBP
View
Retailer 6
-
£1,497 GBP
View
Price last confirmed 9 days ago
A
Retailer 7
-
£1,524 GBP
View
A
Retailer 8
-
£1,575 GBP
View
A
Retailer 9
-
£1,724 GBP
View
Retailer 10
-
£1,724 GBP
View
Price last confirmed 16 days ago
Retailer 11
-
£1,725 GBP
View
Price last confirmed 7 days ago
A
Retailer 12
-
£1,805 GBP
View
Retailer 13
-
£1,898 GBP
View
Price last confirmed 15 days ago
B+
Retailer 14
-
£2,136 GBP
View
A
Retailer 15
-
£2,173 GBP
View
B+
Retailer 16
-
£2,620 GBP
View
Most Expensive
MOH London
74B40F158 · Oct 21
£2,770 GBP
View
Price last confirmed 16 days ago
16 more retailers have this diamond
Prices start from £1,315 GBPSave up to £1,305 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
£1,315 GBP