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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 $8,335 NZD
HK$36,700 HKD
As of October 31, 2026
Save $9,151 NZD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $17,486 NZD 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 $8,335 to $17,486, a $9,151 spread on the same certified stone. Queensmith lists it at $17,486. 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 31
Current: $17,486 NZD|Low: $8,244 NZD|High: $17,621 NZD|Avg: $11,542 NZD|+1.9%
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 31, 2026
Retailer 8$8,335 NZD
Retailer 2$8,890 NZD
Retailer 15$9,287 NZD
Retailer 14$9,492 NZD
Retailer 6$9,805 NZD
Retailer 4$10,241 NZD
Retailer 11$10,413 NZD
Retailer 10$10,644 NZD
Retailer 7$11,041 NZD
Retailer 5$11,375 NZD
Retailer 3$11,599 NZD
Retailer 9$12,125 NZD
Retailer 13$13,511 NZD
Retailer 12$16,434 NZD
Queensmith$17,486 NZD

23 data points across 15 retailers

19 retailers$8,335 NZD to $17,486 NZD

A
Cheapest Retailer
-
$8,335 NZD
HK$36,700 HKD
A
Retailer 2
-
$8,890 NZD
₹477,189 INR
View
A
Retailer 3
-
$9,287 NZD
$5,234 USD
View
A
Retailer 4
-
$9,492 NZD
SGD 7,229 SGD
View
A
Retailer 5
-
$9,805 NZD
SGD 7,468 SGD
View
A
Retailer 6
-
$10,195 NZD
$5,746 USD
View
A
Retailer 7
-
$10,202 NZD
$5,750 USD
View
A
Retailer 8
-
$10,241 NZD
$5,772 USD
View
Final sale: no returns
A
Retailer 9
-
$10,413 NZD
£4,621 GBP
View
A
Retailer 10
-
$10,644 NZD
£4,724 GBP
View
Retailer 11
-
$11,041 NZD
A$9,573 AUD
View
Price last confirmed 20 days ago
Retailer 12
-
$11,169 NZD
$6,295 USD
View
Price last confirmed 15 days ago
B+
Retailer 13
-
$11,323 NZD
A$9,818 AUD
View
B+
Retailer 14
-
$11,375 NZD
$6,411 USD
View
B+
Retailer 15
-
$11,599 NZD
$6,537 USD
View
B+
Retailer 16
-
$12,125 NZD
€6,508 EUR
View
B+
Retailer 17
-
$13,511 NZD
ZAR 123,020 ZAR
View
B
Retailer 18
-
$16,434 NZD
£7,293 GBP
View
Most Expensive
B
Queensmith
2557664390 · Oct 28
$17,486 NZD
£7,760 GBP
View
18 more retailers have this diamond
Prices start from $8,335 NZDSave up to $9,151 NZD

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
$8,335 NZD