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Cushion|Natural|GIA

1.50ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 2231870039

Certificate GIA 2231870039

Diamond specifications and retailer prices

From £2,668 GBP
As of November 6, 2026
Save £3,195 GBP (54%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,863 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 G 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 2231870039. Listed at 9 retailers as of November 4, 2026, with prices from £2,668 to £5,863, a £3,195 spread on the same certified stone. MOH London lists it at £5,863. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.42°
OriginNatural
Grading LabGIA
CertificateGIA 2231870039
Dimensions7.55 × 5.89 × 4.12 mm
L/W Ratio1.28
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
7.55 mm5.89 mm1.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2231870039
Side View
Table 63.0%CrownGirdle: STK-VTKPavilion 35.42°Culet: NoneDepth 69.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,863 GBP|Low: £2,668 GBP|High: £6,302 GBP|Avg: £3,873 GBP|-7.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2£2,668 GBP
Retailer 8£3,252 GBP
Retailer 5£3,390 GBP
Retailer 3£3,405 GBP
Retailer 7£3,757 GBP
Retailer 6£3,857 GBP
Retailer 4£4,191 GBP
MOH London£5,863 GBP

35 data points across 8 retailers

9 retailers£2,668 GBP to £5,863 GBP

A
Cheapest Retailer
-
£2,668 GBP
A
Retailer 2
-
£3,252 GBP
View
A
Retailer 3
-
£3,390 GBP
View
A
Retailer 4
-
£3,405 GBP
View
B+
Retailer 5
-
£3,757 GBP
View
A
Retailer 6
-
£3,857 GBP
View
B+
Retailer 7
-
£4,019 GBP
View
A
Retailer 8
-
£4,191 GBP
View
Most Expensive
B+
MOH London
2E5FD910D · Nov 4
£5,863 GBP
View
8 more retailers have this diamond
Prices start from £2,668 GBPSave up to £3,195 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
£2,668 GBP