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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 $5,940 SGD
HK$36,300 HKD
As of October 30, 2026
Save $6,659 SGD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,599 SGD 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 $5,940 to $12,599, a $6,659 spread on the same certified stone. Queensmith lists it at $12,599. 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: $12,599 SGD|Low: $5,940 SGD|High: $12,696 SGD|Avg: $8,404 SGD|+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 15$5,940 SGD
Retailer 2$6,428 SGD
Retailer 14$6,691 SGD
Retailer 13$6,839 SGD
Retailer 6$7,065 SGD
Retailer 4$7,379 SGD
Retailer 8$7,502 SGD
Retailer 9$7,669 SGD
Retailer 7$7,955 SGD
Retailer 5$8,196 SGD
Retailer 3$8,357 SGD
Retailer 11$8,721 SGD
Retailer 12$9,735 SGD
Retailer 10$11,841 SGD
Queensmith$12,599 SGD

23 data points across 15 retailers

19 retailers$5,940 SGD to $12,599 SGD

A
Cheapest Retailer
-
$5,940 SGD
HK$36,300 HKD
A
Retailer 2
-
$6,428 SGD
₹478,851 INR
View
A
Retailer 3
-
$6,691 SGD
$5,234 USD
View
A
Retailer 4
-
$6,839 SGD
View
A
Retailer 5
-
$7,065 SGD
View
A
Retailer 6
-
$7,346 SGD
$5,746 USD
View
A
Retailer 7
-
$7,351 SGD
$5,750 USD
View
A
Retailer 8
-
$7,379 SGD
$5,772 USD
View
Final sale: no returns
A
Retailer 9
-
$7,502 SGD
£4,621 GBP
View
A
Retailer 10
-
$7,669 SGD
£4,723 GBP
View
Retailer 11
-
$7,955 SGD
A$9,573 AUD
View
Price last confirmed 20 days ago
Retailer 12
-
$8,048 SGD
$6,295 USD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$8,158 SGD
A$9,818 AUD
View
B+
Retailer 14
-
$8,196 SGD
$6,411 USD
View
B+
Retailer 15
-
$8,357 SGD
$6,537 USD
View
B+
Retailer 16
-
$8,721 SGD
€6,497 EUR
View
B+
Retailer 17
-
$9,735 SGD
ZAR 123,020 ZAR
View
B+
Retailer 18
-
$11,841 SGD
£7,293 GBP
View
Most Expensive
B
Queensmith
2557664390 · Oct 28
$12,599 SGD
£7,760 GBP
View
18 more retailers have this diamond
Prices start from $5,940 SGDSave up to $6,659 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
$5,940 SGD