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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 2557257471

Certificate GIA 2557257471

Diamond specifications and retailer prices

From $3,972 AUD
HK$21,800 HKD
As of November 2, 2026
Save $4,417 AUD (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,389 AUD 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 2557257471. Listed at 18 retailers as of November 1, 2026, with prices from $3,972 to $8,389, a $4,417 spread on the same certified stone. MOH London lists it at $8,389. 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
OriginNatural
Grading LabGIA
CertificateGIA 2557257471
Dimensions6.56 × 6.26 × 4.17 mm
L/W Ratio1.05
Top View
6.56 mm6.26 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557257471
Side View
Table 65.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.6%

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: $8,389 AUD|Low: $3,900 AUD|High: $8,852 AUD|Avg: $5,292 AUD|-5.2%
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
November 2, 2026
Retailer 2$3,972 AUD
Retailer 16$4,000 AUD
Retailer 5$4,267 AUD
Retailer 14$4,268 AUD
Retailer 12$4,269 AUD
Retailer 8$4,442 AUD
Retailer 17$4,540 AUD
Retailer 7$4,573 AUD
Retailer 11$4,811 AUD
Retailer 15$4,826 AUD
Retailer 4$5,200 AUD
Retailer 13$5,337 AUD
Retailer 9$5,617 AUD
Retailer 10$5,976 AUD
Retailer 3$6,222 AUD
Retailer 6$8,287 AUD
MOH London$8,389 AUD

25 data points across 17 retailers

18 retailers$3,972 AUD to $8,389 AUD

A
Cheapest Retailer
-
$3,972 AUD
HK$21,800 HKD
A
Retailer 2
-
$4,000 AUD
$2,810 USD
View
A
Retailer 3
-
$4,267 AUD
$2,998 USD
View
A
Retailer 4
-
$4,268 AUD
$2,998 USD
View
A
Retailer 5
-
$4,269 AUD
$2,999 USD
View
Final sale: no returns
A
Retailer 6
-
$4,442 AUD
$3,120 USD
View
A
Retailer 7
-
$4,540 AUD
€3,037 EUR
View
A
Retailer 8
-
$4,573 AUD
$3,212 USD
View
A
Retailer 9
-
$4,811 AUD
$3,379 USD
View
A
Retailer 10
-
$4,826 AUD
$3,390 USD
View
A
Retailer 11
-
$5,200 AUD
$3,653 USD
View
A
Retailer 12
-
$5,337 AUD
£2,952 GBP
View
A
Retailer 13
-
$5,578 AUD
View
Retailer 14
-
$5,617 AUD
View
Price last confirmed 24 days ago
A
Retailer 15
-
$5,976 AUD
€3,998 EUR
View
A
Retailer 16
-
$6,222 AUD
ZAR 70,605 ZAR
View
Retailer 17
-
$8,287 AUD
$5,821 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
895FFE586 · Nov 1
$8,389 AUD
£4,640 GBP
View
17 more retailers have this diamond
Prices start from $3,972 AUDSave up to $4,417 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
$3,972 AUD