CaratHunter
Plans
Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 1545301815

Certificate GIA 1545301815

Diamond specifications and retailer prices

From $3,361 AUD
HK$18,400 HKD
As of November 1, 2026
Save $4,040 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,401 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 1545301815. Listed at 21 retailers as of November 1, 2026, with prices from $3,361 to $7,401, a $4,040 spread on the same certified stone. MOH London lists it at $7,401. 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: $7,401 AUD|Low: $3,324 AUD|High: $7,490 AUD|Avg: $4,399 AUD|-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$3,361 AUD
Retailer 5$3,392 AUD
Retailer 16$3,520 AUD
Retailer 9$3,590 AUD
Retailer 7$3,700 AUD
Retailer 6$3,931 AUD
Retailer 19$3,953 AUD
Retailer 4$3,998 AUD
Retailer 8$4,008 AUD
Retailer 2$4,199 AUD
Retailer 3$4,209 AUD
Retailer 17$4,209 AUD
Retailer 18$4,352 AUD
Retailer 13$4,624 AUD
Retailer 10$4,727 AUD
Retailer 12$5,179 AUD
Retailer 11$5,247 AUD
Retailer 14$5,439 AUD
MOH London$7,401 AUD

28 data points across 19 retailers

21 retailers$3,361 AUD to $7,401 AUD

A
Cheapest Retailer
-
$3,361 AUD
HK$18,400 HKD
A
Retailer 2
-
$3,392 AUD
$2,377 USD
View
A
Retailer 3
-
$3,520 AUD
$2,467 USD
View
A
Retailer 4
-
$3,590 AUD
$2,516 USD
View
A
Retailer 5
-
$3,700 AUD
$2,593 USD
View
Final sale: no returns
A
Retailer 6
-
$3,711 AUD
View
A
Retailer 7
-
$3,931 AUD
$2,755 USD
View
A
Retailer 8
-
$3,953 AUD
$2,770 USD
View
A
Retailer 9
-
$3,998 AUD
$2,802 USD
View
A
Retailer 10
-
$4,008 AUD
$2,809 USD
View
A
Retailer 11
-
$4,199 AUD
£2,317 GBP
View
A
Retailer 12
-
$4,209 AUD
$2,950 USD
View
A
Retailer 13
-
$4,209 AUD
$2,950 USD
View
A
Retailer 14
-
$4,352 AUD
$3,050 USD
View
A
Retailer 15
-
$4,624 AUD
£2,552 GBP
View
Retailer 16
-
$4,727 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
$5,137 AUD
$3,600 USD
View
Price last confirmed 10 days ago
A
Retailer 18
-
$5,179 AUD
€3,457 EUR
View
A
Retailer 19
-
$5,247 AUD
$3,677 USD
View
A
Retailer 20
-
$5,439 AUD
ZAR 61,581 ZAR
View
Most Expensive
B+
MOH London
64A723D81 · Nov 1
$7,401 AUD
£4,084 GBP
View
20 more retailers have this diamond
Prices start from $3,361 AUDSave up to $4,040 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
$3,361 AUD