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Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1543520312

Certificate GIA 1543520312

Diamond specifications and retailer prices

From $2,738 AUD
As of November 6, 2026
Save $3,526 AUD (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,264 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1543520312. Listed at 14 retailers as of November 4, 2026, with prices from $2,738 to $6,264, a $3,526 spread on the same certified stone. MOH London lists it at $6,264. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle37.5°
OriginNatural
Grading LabGIA
CertificateGIA 1543520312
Dimensions7.45 × 6.07 × 4.17 mm
L/W Ratio1.23
Girdle conditionFaceted
Top View
7.45 mm6.07 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543520312
Side View
Table 64.0%CrownGirdle: MED-THKPavilion 37.5°Culet: NoneDepth 68.8%

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 6
Current: $6,264 AUD|Low: $2,701 AUD|High: $6,989 AUD|Avg: $4,360 AUD|-10.4%
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
November 6, 2026
Retailer 13$2,738 AUD
Retailer 10$3,308 AUD
Retailer 11$3,474 AUD
Retailer 5$3,566 AUD
Retailer 9$3,793 AUD
Retailer 3$3,809 AUD
Retailer 6$3,815 AUD
Retailer 4$4,323 AUD
Retailer 7$4,375 AUD
Retailer 2$4,451 AUD
Retailer 8$4,564 AUD
Retailer 12$5,852 AUD
MOH London$6,264 AUD

33 data points across 13 retailers

14 retailers$2,738 AUD to $6,264 AUD

A
Cheapest Retailer
-
$2,738 AUD
A
Retailer 2
-
$3,308 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,474 AUD
View
A
Retailer 4
-
$3,566 AUD
View
A
Retailer 5
-
$3,793 AUD
View
A
Retailer 6
-
$3,809 AUD
View
A
Retailer 7
-
$3,815 AUD
View
A
Retailer 8
-
$4,160 AUD
View
A
Retailer 9
-
$4,323 AUD
View
A
Retailer 10
-
$4,375 AUD
View
A
Retailer 11
-
$4,451 AUD
View
A
Retailer 12
-
$4,564 AUD
View
B+
Retailer 13
-
$5,852 AUD
View
Most Expensive
B+
MOH London
53B5DEFF3 · Nov 4
$6,264 AUD
£3,389 GBP
View
13 more retailers have this diamond
Prices start from $2,738 AUDSave up to $3,526 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
$2,738 AUD