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Cushion|Natural|GIA

1.50ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 2557664390

Certificate GIA 2557664390

Diamond specifications and retailer prices

From HK$36,458 HKD
As of October 30, 2026
Save HK$40,870 HKD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$77,328 HKD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557664390. Listed at 19 retailers as of October 28, 2026, with prices from HK$36,458 to HK$77,328, a HK$40,870 spread on the same certified stone. Queensmith lists it at HK$77,328. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557664390
Dimensions7.39 × 5.70 × 3.89 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Cloud, Needle
Top View
7.39 mm5.70 mm1.50 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557664390
Side View
Table 67.0%CrownGirdle: MED-VTKPavilionCulet: 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: Oct 30
Current: HK$77,328 HKD|Low: HK$36,458 HKD|High: HK$77,926 HKD|Avg: HK$51,579 HKD|+1.4%
Queensmith
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
October 30, 2026
Retailer 15HK$36,458 HKD
Retailer 2HK$39,451 HKD
Retailer 14HK$41,068 HKD
Retailer 13HK$41,974 HKD
Retailer 6HK$43,362 HKD
Retailer 4HK$45,289 HKD
Retailer 8HK$46,047 HKD
Retailer 9HK$47,069 HKD
Retailer 7HK$48,826 HKD
Retailer 5HK$50,301 HKD
Retailer 3HK$51,292 HKD
Retailer 11HK$53,527 HKD
Retailer 12HK$59,750 HKD
Retailer 10HK$72,674 HKD
QueensmithHK$77,328 HKD

23 data points across 15 retailers

19 retailersHK$36,458 HKD to HK$77,328 HKD

A
Cheapest Retailer
-
HK$36,458 HKD
A
Retailer 2
-
HK$39,451 HKD
₹478,851 INR
View
A
Retailer 3
-
HK$41,068 HKD
$5,234 USD
View
A
Retailer 4
-
HK$41,974 HKD
SGD 7,229 SGD
View
A
Retailer 5
-
HK$43,362 HKD
SGD 7,468 SGD
View
A
Retailer 6
-
HK$45,085 HKD
$5,746 USD
View
A
Retailer 7
-
HK$45,117 HKD
$5,750 USD
View
A
Retailer 8
-
HK$45,289 HKD
$5,772 USD
View
Final sale: no returns
A
Retailer 9
-
HK$46,047 HKD
£4,621 GBP
View
A
Retailer 10
-
HK$47,069 HKD
£4,723 GBP
View
Retailer 11
-
HK$48,826 HKD
A$9,573 AUD
View
Price last confirmed 19 days ago
Retailer 12
-
HK$49,393 HKD
$6,295 USD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
HK$50,073 HKD
A$9,818 AUD
View
B+
Retailer 14
-
HK$50,301 HKD
$6,411 USD
View
B+
Retailer 15
-
HK$51,292 HKD
$6,537 USD
View
B+
Retailer 16
-
HK$53,527 HKD
€6,497 EUR
View
B+
Retailer 17
-
HK$59,750 HKD
ZAR 123,020 ZAR
View
B+
Retailer 18
-
HK$72,674 HKD
£7,293 GBP
View
Most Expensive
B
Queensmith
2557664390 · Oct 28
HK$77,328 HKD
£7,760 GBP
View
18 more retailers have this diamond
Prices start from HK$36,458 HKDSave up to HK$40,870 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$36,458 HKD