Cushion|Natural|GIA

1.50ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6551751587

Certificate GIA 6551751587

Diamond specifications and retailer prices

From $4,800 USD
As of November 6, 2026
Save $4,604 USD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $9,931 USD 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 4, 2026, with a 96% 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
Color
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: $9,931 USD|Low: $4,761 USD|High: $10,052 USD|Avg: $6,669 USD|+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$4,800 USD
Retailer 7$5,072 USD
Retailer 14$5,346 USD
Retailer 11$5,685 USD
Retailer 3$5,908 USD
Retailer 8$5,956 USD
Retailer 2$6,095 USD
Retailer 4$6,300 USD
Retailer 6$6,366 USD
Retailer 5$6,558 USD
Retailer 9$6,955 USD
Retailer 10$7,809 USD
Retailer 12$9,404 USD
Queensmith$9,931 USD

25 data points across 14 retailers

19 retailers$4,800 USD to $9,404 USD

A
Cheapest Retailer
-
$4,800 USD
A
Retailer 2
-
$5,072 USD
View
A
Retailer 3
-
$5,346 USD
View
Retailer 4
-
$5,510 USD
View
Price last confirmed 24 days ago
B+
Retailer 5
-
$5,685 USD
View
B+
Retailer 6
-
$5,879 USD
View
B+
Retailer 7
-
$5,880 USD
View
B+
Retailer 8
-
$5,908 USD
View
Final sale: no returns
B+
Retailer 9
-
$5,956 USD
View
B+
Retailer 10
-
$6,095 USD
View
B+
Retailer 11
-
$6,300 USD
View
Retailer 12
-
$6,366 USD
View
Price last confirmed 29 days ago
Retailer 13
-
$6,440 USD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$6,558 USD
View
B+
Retailer 15
-
$6,641 USD
View
B+
Retailer 16
-
$6,955 USD
View
B+
Retailer 17
-
$7,809 USD
View
B
Retailer 18
-
$9,404 USD
View
Most Expensive
Queensmith
6551751587 · Oct 22
$9,931 USD
£7,820 GBP
View
Price last confirmed 15 days ago
18 more retailers have this diamond
Prices start from $4,800 USDSave up to $4,604 USD

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
$4,800 USD