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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 $6,614 AUD
HK$36,300 HKD
As of October 29, 2026
Save $7,414 AUD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,028 AUD 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 $6,614 to $14,028, a $7,414 spread on the same certified stone. Queensmith lists it at $14,028. 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 29
Current: $14,028 AUD|Low: $6,614 AUD|High: $14,136 AUD|Avg: $9,360 AUD|+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$6,614 AUD
Retailer 9$7,162 AUD
Retailer 14$7,450 AUD
Retailer 13$7,614 AUD
Retailer 6$7,866 AUD
Retailer 4$8,216 AUD
Retailer 2$8,353 AUD
Retailer 8$8,539 AUD
Retailer 7$8,857 AUD
Retailer 5$9,125 AUD
Retailer 3$9,305 AUD
Retailer 11$9,710 AUD
Retailer 12$10,839 AUD
Retailer 10$13,184 AUD
Queensmith$14,028 AUD

23 data points across 15 retailers

19 retailers$6,614 AUD to $14,028 AUD

A
Cheapest Retailer
-
$6,614 AUD
HK$36,300 HKD
A
Retailer 2
-
$7,162 AUD
₹479,215 INR
View
A
Retailer 3
-
$7,450 AUD
$5,234 USD
View
A
Retailer 4
-
$7,614 AUD
SGD 7,229 SGD
View
A
Retailer 5
-
$7,866 AUD
SGD 7,468 SGD
View
A
Retailer 6
-
$8,179 AUD
$5,746 USD
View
A
Retailer 7
-
$8,185 AUD
$5,750 USD
View
A
Retailer 8
-
$8,216 AUD
$5,772 USD
View
Final sale: no returns
A
Retailer 9
-
$8,353 AUD
£4,621 GBP
View
A
Retailer 10
-
$8,539 AUD
£4,723 GBP
View
Retailer 11
-
$8,857 AUD
View
Price last confirmed 19 days ago
Retailer 12
-
$8,960 AUD
$6,295 USD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$9,084 AUD
View
B+
Retailer 14
-
$9,125 AUD
$6,411 USD
View
B+
Retailer 15
-
$9,305 AUD
$6,537 USD
View
B+
Retailer 16
-
$9,710 AUD
€6,497 EUR
View
B+
Retailer 17
-
$10,839 AUD
ZAR 123,020 ZAR
View
B+
Retailer 18
-
$13,184 AUD
£7,293 GBP
View
Most Expensive
B
Queensmith
2557664390 · Oct 28
$14,028 AUD
£7,760 GBP
View
18 more retailers have this diamond
Prices start from $6,614 AUDSave up to $7,414 AUD

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
$6,614 AUD