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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6541605256

Certificate GIA 6541605256

Diamond specifications and retailer prices

From £2,242 GBP
HK$23,500 HKD
As of November 2, 2026
Save £2,509 GBP (53%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £4,751 GBP at MOH London · As of November 1, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541605256. Listed at 22 retailers as of November 1, 2026, with prices from £2,242 to £4,751, a £2,509 spread on the same certified stone. MOH London lists it at £4,751. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle39°
OriginNatural
Grading LabGIA
CertificateGIA 6541605256
Dimensions6.78 × 6.57 × 4.38 mm
L/W Ratio1.03
Top View
6.78 mm6.57 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541605256
Side View
Table 66.0%CrownGirdle: THK-VTKPavilion 39°Culet: NoneDepth 66.7%

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 2
Current: £4,751 GBP|Low: £2,203 GBP|High: £4,816 GBP|Avg: £2,897 GBP|-1.4%
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
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 13£2,242 GBP
Retailer 3£2,247 GBP
Retailer 19£2,365 GBP
Retailer 6£2,399 GBP
Retailer 17£2,414 GBP
Retailer 10£2,500 GBP
Retailer 4£2,540 GBP
Retailer 9£2,549 GBP
Retailer 16£2,698 GBP
Retailer 14£2,740 GBP
Retailer 2£2,742 GBP
Retailer 11£2,832 GBP
Retailer 7£2,894 GBP
Retailer 18£2,954 GBP
Retailer 12£2,967 GBP
Retailer 15£3,380 GBP
Retailer 5£3,521 GBP
Retailer 8£4,648 GBP
MOH London£4,751 GBP

19 data points across 19 retailers

22 retailers£2,242 GBP to £4,751 GBP

A
Cheapest Retailer
-
£2,242 GBP
HK$23,500 HKD
A
Retailer 2
-
£2,247 GBP
$3,015 USD
View
A
Retailer 3
-
£2,365 GBP
$3,174 USD
View
A
Retailer 4
-
£2,399 GBP
$3,219 USD
View
A
Retailer 5
-
£2,414 GBP
$3,240 USD
View
Final sale: no returns
A
Retailer 6
-
£2,500 GBP
$3,355 USD
View
A
Retailer 7
-
£2,540 GBP
€3,246 EUR
View
A
Retailer 8
-
£2,549 GBP
$3,421 USD
View
A
Retailer 9
-
£2,698 GBP
$3,620 USD
View
A
Retailer 10
-
£2,740 GBP
View
A
Retailer 11
-
£2,742 GBP
$3,680 USD
View
A
Retailer 12
-
£2,832 GBP
SGD 5,136 SGD
View
Retailer 13
-
£2,894 GBP
$3,884 USD
View
Price last confirmed 13 days ago
Retailer 14
-
£2,943 GBP
$3,949 USD
View
Price last confirmed 12 days ago
A
Retailer 15
-
£2,954 GBP
View
A
Retailer 16
-
£2,967 GBP
$3,981 USD
View
A
Retailer 17
-
£3,104 GBP
A$6,408 AUD
View
Retailer 18
-
£3,145 GBP
A$6,493 AUD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
£3,380 GBP
€4,320 EUR
View
B+
Retailer 20
-
£3,521 GBP
ZAR 76,327 ZAR
View
Retailer 21
-
£4,648 GBP
$6,237 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
8B8AE58D9 · Nov 1
£4,751 GBP
View
21 more retailers have this diamond
Prices start from £2,242 GBPSave up to £2,509 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
£2,242 GBP