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Cushion|Natural|GIA

1.50ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6551160529

Certificate GIA 6551160529

Diamond specifications and retailer prices

From $10,643 NZD
As of November 6, 2026
Save $8,823 NZD (45%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $20,160 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 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 6551160529. Listed at 20 retailers as of November 6, 2026, with a 83% 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551160529
Dimensions7.96 × 5.95 × 3.91 mm
L/W Ratio1.34
Top View
7.96 mm5.95 mm1.50 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551160529
Side View
Table 67.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 65.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $20,160 NZD|Low: $10,551 NZD|High: $20,367 NZD|Avg: $14,434 NZD|-1.0%
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
Retailer 16
November 7, 2026
Retailer 5$10,643 NZD
Retailer 12$11,181 NZD
Retailer 8$11,512 NZD
Retailer 7$12,267 NZD
Retailer 15$12,660 NZD
Retailer 4$12,963 NZD
Retailer 11$12,970 NZD
Retailer 6$13,096 NZD
Retailer 10$13,143 NZD
Retailer 2$13,152 NZD
Retailer 16$14,339 NZD
Retailer 3$14,543 NZD
Retailer 13$15,256 NZD
Retailer 14$17,133 NZD
Retailer 9$19,466 NZD
Queensmith$20,160 NZD

22 data points across 16 retailers

20 retailers$10,643 NZD to $19,466 NZD

B+
Cheapest Retailer
-
$10,643 NZD
B+
Retailer 2
-
$11,181 NZD
View
B+
Retailer 3
-
$11,512 NZD
View
B+
Retailer 4
-
$12,267 NZD
View
Retailer 5
-
$12,270 NZD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
$12,660 NZD
View
B+
Retailer 7
-
$12,963 NZD
View
Final sale: no returns
B+
Retailer 8
-
$12,970 NZD
View
B+
Retailer 9
-
$12,975 NZD
View
Retailer 10
-
$13,096 NZD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$13,143 NZD
View
B+
Retailer 12
-
$13,152 NZD
View
Retailer 13
-
$13,960 NZD
View
Price last confirmed 34 days ago
B+
Retailer 14
-
$14,339 NZD
View
B+
Retailer 15
-
$14,361 NZD
View
B+
Retailer 16
-
$14,543 NZD
View
B+
Retailer 17
-
$15,256 NZD
View
B
Retailer 18
-
$17,133 NZD
View
B
Retailer 19
-
$19,466 NZD
View
Most Expensive
Queensmith
6551160529 · Oct 28
$20,160 NZD
£8,800 GBP
View
Price last confirmed 9 days ago
19 more retailers have this diamond
Prices start from $10,643 NZDSave up to $8,823 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.

B+
1.50ct Cushion
$10,643 NZD