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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 1545301815

Certificate GIA 1545301815

Diamond specifications and retailer prices

From $4,179 NZD
HK$18,400 HKD
As of November 1, 2026
Save $5,024 NZD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,203 NZD 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 1545301815. Listed at 21 retailers as of November 1, 2026, with prices from $4,179 to $9,203, a $5,024 spread on the same certified stone. MOH London lists it at $9,203. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle35.9°
OriginNatural
Grading LabGIA
CertificateGIA 1545301815
Dimensions6.47 × 6.44 × 4.41 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.47 mm6.44 mm1.50 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545301815
Side View
Table 64.0%Crown 38°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 68.4%

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 1
Current: $9,203 NZD|Low: $4,133 NZD|High: $9,313 NZD|Avg: $5,471 NZD|-1.2%
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
Retailer 18
Retailer 19
November 2, 2026
Retailer 15$4,179 NZD
Retailer 5$4,218 NZD
Retailer 16$4,377 NZD
Retailer 9$4,464 NZD
Retailer 7$4,601 NZD
Retailer 6$4,888 NZD
Retailer 19$4,915 NZD
Retailer 4$4,972 NZD
Retailer 8$4,984 NZD
Retailer 2$5,221 NZD
Retailer 3$5,234 NZD
Retailer 17$5,234 NZD
Retailer 18$5,412 NZD
Retailer 13$5,750 NZD
Retailer 10$5,878 NZD
Retailer 12$6,440 NZD
Retailer 11$6,524 NZD
Retailer 14$6,763 NZD
MOH London$9,203 NZD

28 data points across 19 retailers

21 retailers$4,179 NZD to $9,203 NZD

A
Cheapest Retailer
-
$4,179 NZD
HK$18,400 HKD
A
Retailer 2
-
$4,218 NZD
$2,377 USD
View
A
Retailer 3
-
$4,377 NZD
$2,467 USD
View
A
Retailer 4
-
$4,464 NZD
$2,516 USD
View
A
Retailer 5
-
$4,601 NZD
$2,593 USD
View
Final sale: no returns
A
Retailer 6
-
$4,615 NZD
A$4,001 AUD
View
A
Retailer 7
-
$4,888 NZD
$2,755 USD
View
A
Retailer 8
-
$4,915 NZD
$2,770 USD
View
A
Retailer 9
-
$4,972 NZD
$2,802 USD
View
A
Retailer 10
-
$4,984 NZD
$2,809 USD
View
A
Retailer 11
-
$5,221 NZD
£2,317 GBP
View
A
Retailer 12
-
$5,234 NZD
$2,950 USD
View
A
Retailer 13
-
$5,234 NZD
$2,950 USD
View
A
Retailer 14
-
$5,412 NZD
$3,050 USD
View
A
Retailer 15
-
$5,750 NZD
£2,552 GBP
View
Retailer 16
-
$5,878 NZD
A$5,097 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
$6,387 NZD
$3,600 USD
View
Price last confirmed 10 days ago
A
Retailer 18
-
$6,440 NZD
€3,457 EUR
View
A
Retailer 19
-
$6,524 NZD
$3,677 USD
View
A
Retailer 20
-
$6,763 NZD
ZAR 61,581 ZAR
View
Most Expensive
B+
MOH London
64A723D81 · Nov 1
$9,203 NZD
£4,084 GBP
View
20 more retailers have this diamond
Prices start from $4,179 NZDSave up to $5,024 NZD

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
$4,179 NZD