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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 $3,011 SGD
HK$18,400 HKD
As of November 1, 2026
Save $3,620 SGD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,631 SGD 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 $3,011 to $6,631, a $3,620 spread on the same certified stone. MOH London lists it at $6,631. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $6,631 SGD|Low: $2,978 SGD|High: $6,710 SGD|Avg: $3,942 SGD|-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$3,011 SGD
Retailer 5$3,039 SGD
Retailer 16$3,154 SGD
Retailer 9$3,216 SGD
Retailer 7$3,315 SGD
Retailer 6$3,522 SGD
Retailer 19$3,541 SGD
Retailer 4$3,582 SGD
Retailer 8$3,591 SGD
Retailer 2$3,762 SGD
Retailer 3$3,771 SGD
Retailer 17$3,771 SGD
Retailer 18$3,899 SGD
Retailer 13$4,143 SGD
Retailer 10$4,235 SGD
Retailer 12$4,640 SGD
Retailer 11$4,701 SGD
Retailer 14$4,873 SGD
MOH London$6,631 SGD

28 data points across 19 retailers

21 retailers$3,011 SGD to $6,631 SGD

A
Cheapest Retailer
-
$3,011 SGD
HK$18,400 HKD
A
Retailer 2
-
$3,039 SGD
$2,377 USD
View
A
Retailer 3
-
$3,154 SGD
$2,467 USD
View
A
Retailer 4
-
$3,216 SGD
$2,516 USD
View
A
Retailer 5
-
$3,315 SGD
$2,593 USD
View
Final sale: no returns
A
Retailer 6
-
$3,325 SGD
A$4,001 AUD
View
A
Retailer 7
-
$3,522 SGD
$2,755 USD
View
A
Retailer 8
-
$3,541 SGD
$2,770 USD
View
A
Retailer 9
-
$3,582 SGD
$2,802 USD
View
A
Retailer 10
-
$3,591 SGD
$2,809 USD
View
A
Retailer 11
-
$3,762 SGD
£2,317 GBP
View
A
Retailer 12
-
$3,771 SGD
$2,950 USD
View
A
Retailer 13
-
$3,771 SGD
$2,950 USD
View
A
Retailer 14
-
$3,899 SGD
$3,050 USD
View
A
Retailer 15
-
$4,143 SGD
£2,552 GBP
View
Retailer 16
-
$4,235 SGD
A$5,097 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
$4,602 SGD
$3,600 USD
View
Price last confirmed 10 days ago
A
Retailer 18
-
$4,640 SGD
€3,457 EUR
View
A
Retailer 19
-
$4,701 SGD
$3,677 USD
View
A
Retailer 20
-
$4,873 SGD
ZAR 61,581 ZAR
View
Most Expensive
B+
MOH London
64A723D81 · Nov 1
$6,631 SGD
£4,084 GBP
View
20 more retailers have this diamond
Prices start from $3,011 SGDSave up to $3,620 SGD

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
$3,011 SGD