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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 HK$18,478 HKD
As of November 1, 2026
Save HK$22,215 HKD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: HK$40,693 HKD 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 HK$18,478 to HK$40,693, a HK$22,215 spread on the same certified stone. MOH London lists it at HK$40,693. 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: HK$40,693 HKD|Low: HK$18,277 HKD|High: HK$41,181 HKD|Avg: HK$24,190 HKD|-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 15HK$18,478 HKD
Retailer 5HK$18,649 HKD
Retailer 16HK$19,355 HKD
Retailer 9HK$19,740 HKD
Retailer 7HK$20,344 HKD
Retailer 6HK$21,615 HKD
Retailer 19HK$21,733 HKD
Retailer 4HK$21,984 HKD
Retailer 8HK$22,039 HKD
Retailer 2HK$23,086 HKD
Retailer 3HK$23,145 HKD
Retailer 17HK$23,145 HKD
Retailer 18HK$23,929 HKD
Retailer 13HK$25,424 HKD
Retailer 10HK$25,993 HKD
Retailer 12HK$28,479 HKD
Retailer 11HK$28,849 HKD
Retailer 14HK$29,907 HKD
MOH LondonHK$40,693 HKD

28 data points across 19 retailers

21 retailersHK$18,478 HKD to HK$40,693 HKD

A
Cheapest Retailer
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HK$18,478 HKD
A
Retailer 2
-
HK$18,649 HKD
$2,377 USD
View
A
Retailer 3
-
HK$19,355 HKD
$2,467 USD
View
A
Retailer 4
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HK$19,740 HKD
$2,516 USD
View
A
Retailer 5
-
HK$20,344 HKD
$2,593 USD
View
Final sale: no returns
A
Retailer 6
-
HK$20,405 HKD
A$4,001 AUD
View
A
Retailer 7
-
HK$21,615 HKD
$2,755 USD
View
A
Retailer 8
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HK$21,733 HKD
$2,770 USD
View
A
Retailer 9
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HK$21,984 HKD
$2,802 USD
View
A
Retailer 10
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HK$22,039 HKD
$2,809 USD
View
A
Retailer 11
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HK$23,086 HKD
£2,317 GBP
View
A
Retailer 12
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HK$23,145 HKD
$2,950 USD
View
A
Retailer 13
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HK$23,145 HKD
$2,950 USD
View
A
Retailer 14
-
HK$23,929 HKD
$3,050 USD
View
A
Retailer 15
-
HK$25,424 HKD
£2,552 GBP
View
Retailer 16
-
HK$25,993 HKD
A$5,097 AUD
View
Price last confirmed 25 days ago
Retailer 17
-
HK$28,245 HKD
$3,600 USD
View
Price last confirmed 10 days ago
A
Retailer 18
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HK$28,479 HKD
€3,457 EUR
View
A
Retailer 19
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HK$28,849 HKD
$3,677 USD
View
A
Retailer 20
-
HK$29,907 HKD
ZAR 61,581 ZAR
View
Most Expensive
B+
MOH London
64A723D81 · Nov 1
HK$40,693 HKD
£4,084 GBP
View
20 more retailers have this diamond
Prices start from HK$18,478 HKDSave up to HK$22,215 HKD

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
HK$18,478 HKD