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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 $8,587 AUD
As of November 6, 2026
Save $7,118 AUD (45%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $16,266 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 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: $16,266 AUD|Low: $8,513 AUD|High: $16,432 AUD|Avg: $11,645 AUD|-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$8,587 AUD
Retailer 12$9,021 AUD
Retailer 8$9,288 AUD
Retailer 7$9,897 AUD
Retailer 15$10,214 AUD
Retailer 4$10,459 AUD
Retailer 11$10,464 AUD
Retailer 6$10,566 AUD
Retailer 10$10,604 AUD
Retailer 2$10,611 AUD
Retailer 16$11,569 AUD
Retailer 3$11,733 AUD
Retailer 13$12,308 AUD
Retailer 14$13,823 AUD
Retailer 9$15,705 AUD
Queensmith$16,266 AUD

22 data points across 16 retailers

20 retailers$8,587 AUD to $15,705 AUD

B+
Cheapest Retailer
-
$8,587 AUD
B+
Retailer 2
-
$9,021 AUD
View
B+
Retailer 3
-
$9,288 AUD
View
B+
Retailer 4
-
$9,897 AUD
View
Retailer 5
-
$9,900 AUD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
$10,214 AUD
View
B+
Retailer 7
-
$10,459 AUD
View
Final sale: no returns
B+
Retailer 8
-
$10,464 AUD
View
B+
Retailer 9
-
$10,469 AUD
View
Retailer 10
-
$10,566 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$10,604 AUD
View
B+
Retailer 12
-
$10,611 AUD
View
Retailer 13
-
$11,263 AUD
View
Price last confirmed 34 days ago
B+
Retailer 14
-
$11,569 AUD
View
B+
Retailer 15
-
$11,586 AUD
View
B+
Retailer 16
-
$11,733 AUD
View
B+
Retailer 17
-
$12,308 AUD
View
B
Retailer 18
-
$13,823 AUD
View
B
Retailer 19
-
$15,705 AUD
View
Most Expensive
Queensmith
6551160529 · Oct 28
$16,266 AUD
£8,800 GBP
View
Price last confirmed 9 days ago
19 more retailers have this diamond
Prices start from $8,587 AUDSave up to $7,118 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.

B+
1.50ct Cushion
$8,587 AUD