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Cushion|Natural|GIA

1.50ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6551751587

Certificate GIA 6551751587

Diamond specifications and retailer prices

From $8,659 NZD
As of November 6, 2026
Save $8,262 NZD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $17,915 NZD at Queensmith · As of October 22, 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 F 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 6551751587. Listed at 19 retailers as of November 6, 2026, with a 95% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551751587
Dimensions7.45 × 5.66 × 3.94 mm
L/W Ratio1.32
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Natural
Top View
7.45 mm5.66 mm1.50 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551751587
Side View
Table 66.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 69.6%

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 6
Current: $17,915 NZD|Low: $8,588 NZD|High: $18,133 NZD|Avg: $12,042 NZD|+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
November 7, 2026
Retailer 13$8,659 NZD
Retailer 9$9,149 NZD
Retailer 14$9,644 NZD
Retailer 12$10,255 NZD
Retailer 3$10,657 NZD
Retailer 2$10,814 NZD
Retailer 8$10,995 NZD
Retailer 4$11,365 NZD
Retailer 6$11,484 NZD
Retailer 5$11,830 NZD
Retailer 10$12,546 NZD
Retailer 11$14,087 NZD
Retailer 7$16,921 NZD
Queensmith$17,915 NZD

25 data points across 14 retailers

19 retailers$8,659 NZD to $16,921 NZD

A
Cheapest Retailer
-
$8,659 NZD
A
Retailer 2
-
$9,149 NZD
View
A
Retailer 3
-
$9,644 NZD
View
Retailer 4
-
$9,939 NZD
View
Price last confirmed 24 days ago
B+
Retailer 5
-
$10,255 NZD
View
B+
Retailer 6
-
$10,605 NZD
View
B+
Retailer 7
-
$10,607 NZD
View
B+
Retailer 8
-
$10,657 NZD
View
Final sale: no returns
B+
Retailer 9
-
$10,814 NZD
View
B+
Retailer 10
-
$10,995 NZD
View
B+
Retailer 11
-
$11,365 NZD
View
Retailer 12
-
$11,484 NZD
View
Price last confirmed 29 days ago
Retailer 13
-
$11,617 NZD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$11,830 NZD
View
B+
Retailer 15
-
$11,980 NZD
View
B+
Retailer 16
-
$12,546 NZD
View
B+
Retailer 17
-
$14,087 NZD
View
B
Retailer 18
-
$16,921 NZD
View
Most Expensive
Queensmith
6551751587 · Oct 22
$17,915 NZD
£7,820 GBP
View
Price last confirmed 16 days ago
18 more retailers have this diamond
Prices start from $8,659 NZDSave up to $8,262 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
$8,659 NZD