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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 2458259458

Shape and cutting style on the report: Cushion modified brilliant

Certificate GIA 2458259458

Diamond specifications and retailer prices

From £5,593 GBP
$7,505 USD
As of November 2, 2026
Save £4,265 GBP (43%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £9,858 GBP at MOH London · As of November 2, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2458259458. Listed at 22 retailers as of November 2, 2026, with prices from £5,593 to £9,858, a £4,265 spread on the same certified stone. MOH London lists it at £9,858. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2458259458
Dimensions7.42 × 6.03 × 4.12 mm
L/W Ratio1.23
Top View
7.42 mm6.03 mm1.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2458259458
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £9,858 GBP|Low: £5,260 GBP|High: £9,977 GBP|Avg: £7,169 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9£5,593 GBP
Retailer 6£5,626 GBP
Retailer 7£6,312 GBP
Retailer 8£6,312 GBP
Retailer 3£6,898 GBP
Retailer 5£6,930 GBP
Retailer 2£7,842 GBP
Retailer 4£9,273 GBP
MOH London£9,858 GBP

43 data points across 9 retailers

22 retailers£5,593 GBP to £9,858 GBP

B
Cheapest Retailer
-
£5,593 GBP
$7,505 USD
Retailer 2
-
£5,626 GBP
$7,550 USD
View
Price last confirmed 14 days ago
B
Retailer 3
-
£5,877 GBP
$7,887 USD
View
B
Retailer 4
-
£5,901 GBP
A$12,183 AUD
View
B
Retailer 5
-
£5,910 GBP
$7,931 USD
View
B
Retailer 6
-
£6,084 GBP
$8,165 USD
View
B
Retailer 7
-
£6,158 GBP
CA$11,477 CAD
View
B
Retailer 8
-
£6,274 GBP
$8,420 USD
View
B
Retailer 9
-
£6,312 GBP
$8,470 USD
View
B
Retailer 10
-
£6,312 GBP
$8,470 USD
View
Final sale: no returns
B
Retailer 11
-
£6,365 GBP
$8,541 USD
View
B
Retailer 12
-
£6,898 GBP
View
Retailer 13
-
£6,930 GBP
A$14,307 AUD
View
Price last confirmed 10 days ago
B
Retailer 14
-
£7,038 GBP
$9,444 USD
View
C
Retailer 15
-
£7,261 GBP
$9,744 USD
View
C
Retailer 16
-
£7,467 GBP
$10,020 USD
View
C
Retailer 17
-
£7,467 GBP
$10,020 USD
View
C
Retailer 18
-
£7,713 GBP
$10,350 USD
View
B
Retailer 19
-
£7,842 GBP
€10,022 EUR
View
Retailer 20
-
£8,310 GBP
$11,151 USD
View
Price last confirmed 10 days ago
C
Retailer 21
-
£9,273 GBP
ZAR 201,028 ZAR
View
Most Expensive
C
MOH London
D404E7B54 · Nov 2
£9,858 GBP
View
21 more retailers have this diamond
Prices start from £5,593 GBPSave up to £4,265 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.

B
1.50ct Cushion
£5,593 GBP