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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 $5,197 AUD
As of November 6, 2026
Save $6,224 AUD (54%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $11,421 AUD 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 $5,197 to $11,421, a $6,224 spread on the same certified stone. MOH London lists it at $11,421. 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: $11,421 AUD|Low: $5,197 AUD|High: $12,277 AUD|Avg: $7,544 AUD|-7.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2$5,197 AUD
Retailer 8$6,335 AUD
Retailer 5$6,605 AUD
Retailer 3$6,634 AUD
Retailer 7$7,319 AUD
Retailer 6$7,514 AUD
Retailer 4$8,165 AUD
MOH London$11,421 AUD

35 data points across 8 retailers

9 retailers$5,197 AUD to $11,421 AUD

A
Cheapest Retailer
-
$5,197 AUD
A
Retailer 2
-
$6,335 AUD
View
A
Retailer 3
-
$6,605 AUD
View
A
Retailer 4
-
$6,634 AUD
View
B+
Retailer 5
-
$7,319 AUD
View
A
Retailer 6
-
$7,514 AUD
View
B+
Retailer 7
-
$7,830 AUD
View
A
Retailer 8
-
$8,165 AUD
View
Most Expensive
B+
MOH London
2E5FD910D · Nov 4
$11,421 AUD
£6,179 GBP
View
8 more retailers have this diamond
Prices start from $5,197 AUDSave up to $6,224 AUD

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
$5,197 AUD