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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 $2,355 USD
HK$18,400 HKD
As of November 1, 2026
Save $2,831 USD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $5,187 USD 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 $2,355 to $5,187, a $2,831 spread on the same certified stone. MOH London lists it at $5,187. 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
Color
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: $5,187 USD|Low: $2,330 USD|High: $5,249 USD|Avg: $3,091 USD|-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 14$2,355 USD
Retailer 5$2,377 USD
Retailer 16$2,467 USD
Retailer 9$2,516 USD
Retailer 7$2,593 USD
Retailer 6$2,755 USD
Retailer 19$2,770 USD
Retailer 4$2,802 USD
Retailer 8$2,809 USD
Retailer 12$2,943 USD
Retailer 3$2,950 USD
Retailer 17$2,950 USD
Retailer 18$3,050 USD
Retailer 2$3,240 USD
Retailer 10$3,313 USD
Retailer 15$3,631 USD
Retailer 11$3,677 USD
Retailer 13$3,812 USD
MOH London$5,187 USD

28 data points across 19 retailers

21 retailers$2,355 USD to $5,187 USD

A
Cheapest Retailer
-
$2,355 USD
HK$18,400 HKD
A
Retailer 2
-
$2,377 USD
View
A
Retailer 3
-
$2,467 USD
View
A
Retailer 4
-
$2,516 USD
View
A
Retailer 5
-
$2,593 USD
View
Final sale: no returns
A
Retailer 6
-
$2,601 USD
A$4,001 AUD
View
A
Retailer 7
-
$2,755 USD
View
A
Retailer 8
-
$2,770 USD
View
A
Retailer 9
-
$2,802 USD
View
A
Retailer 10
-
$2,809 USD
View
A
Retailer 11
-
$2,943 USD
£2,317 GBP
View
A
Retailer 12
-
$2,950 USD
View
A
Retailer 13
-
$2,950 USD
View
A
Retailer 14
-
$3,050 USD
View
A
Retailer 15
-
$3,240 USD
£2,552 GBP
View
Retailer 16
-
$3,313 USD
A$5,097 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
$3,600 USD
View
Price last confirmed 9 days ago
A
Retailer 18
-
$3,631 USD
€3,458 EUR
View
A
Retailer 19
-
$3,677 USD
View
A
Retailer 20
-
$3,812 USD
ZAR 61,581 ZAR
View
Most Expensive
B+
MOH London
64A723D81 · Nov 1
$5,187 USD
£4,084 GBP
View
20 more retailers have this diamond
Prices start from $2,355 USDSave up to $2,831 USD

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
$2,355 USD