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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 $6,152 SGD
As of November 6, 2026
Save $5,870 SGD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,728 SGD 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: $12,728 SGD|Low: $6,102 SGD|High: $12,883 SGD|Avg: $8,549 SGD|+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$6,152 SGD
Retailer 8$6,500 SGD
Retailer 14$6,851 SGD
Retailer 12$7,286 SGD
Retailer 3$7,572 SGD
Retailer 9$7,633 SGD
Retailer 7$7,811 SGD
Retailer 4$8,074 SGD
Retailer 6$8,159 SGD
Retailer 5$8,405 SGD
Retailer 10$8,914 SGD
Retailer 11$10,008 SGD
Retailer 2$12,021 SGD
Queensmith$12,728 SGD

25 data points across 14 retailers

19 retailers$6,152 SGD to $12,021 SGD

A
Cheapest Retailer
-
$6,152 SGD
A
Retailer 2
-
$6,500 SGD
View
A
Retailer 3
-
$6,851 SGD
View
Retailer 4
-
$7,062 SGD
View
Price last confirmed 24 days ago
B+
Retailer 5
-
$7,286 SGD
View
B+
Retailer 6
-
$7,535 SGD
View
B+
Retailer 7
-
$7,536 SGD
View
B+
Retailer 8
-
$7,572 SGD
View
Final sale: no returns
B+
Retailer 9
-
$7,633 SGD
View
B+
Retailer 10
-
$7,811 SGD
View
B+
Retailer 11
-
$8,074 SGD
View
Retailer 12
-
$8,159 SGD
View
Price last confirmed 29 days ago
Retailer 13
-
$8,254 SGD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$8,405 SGD
View
B+
Retailer 15
-
$8,511 SGD
View
B+
Retailer 16
-
$8,914 SGD
View
B+
Retailer 17
-
$10,008 SGD
View
B
Retailer 18
-
$12,021 SGD
View
Most Expensive
Queensmith
6551751587 · Oct 22
$12,728 SGD
£7,820 GBP
View
Price last confirmed 16 days ago
18 more retailers have this diamond
Prices start from $6,152 SGDSave up to $5,870 SGD

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
$6,152 SGD