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Cushion|Natural|GIA

1.50ct F SI2 Cushion Natural Diamond

EX • F/SI2 • GIA 2557551279

Certificate GIA 2557551279

Diamond specifications and retailer prices

From £3,090 GBP
HK$32,400 HKD
As of November 1, 2026
Save £3,813 GBP (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,904 GBP 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557551279. Listed at 15 retailers as of October 28, 2026, with prices from £3,090 to £6,904, a £3,813 spread on the same certified stone. Queensmith lists it at £6,904. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557551279
Dimensions7.54 × 5.81 × 3.99 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
7.54 mm5.81 mm1.50 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2557551279
Side View
Table 65.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.7%

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 1
Current: £6,904 GBP|Low: £3,062 GBP|High: £6,951 GBP|Avg: £4,384 GBP|+2.0%
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
November 2, 2026
Retailer 10£3,090 GBP
Retailer 2£3,297 GBP
Retailer 5£3,641 GBP
Retailer 3£3,809 GBP
Retailer 6£3,888 GBP
Retailer 12£3,935 GBP
Retailer 8£4,026 GBP
Retailer 11£4,126 GBP
Retailer 4£4,241 GBP
Retailer 13£4,336 GBP
Retailer 7£4,669 GBP
Retailer 9£6,573 GBP
Queensmith£6,904 GBP

24 data points across 13 retailers

15 retailers£3,090 GBP to £6,904 GBP

A
Cheapest Retailer
-
£3,090 GBP
HK$32,400 HKD
A
Retailer 2
-
£3,297 GBP
₹421,397 INR
View
A
Retailer 3
-
£3,641 GBP
SGD 6,603 SGD
View
A
Retailer 4
-
£3,786 GBP
$5,080 USD
View
A
Retailer 5
-
£3,809 GBP
$5,111 USD
View
Final sale: no returns
A
Retailer 6
-
£3,888 GBP
View
B+
Retailer 7
-
£3,935 GBP
SGD 7,135 SGD
View
A
Retailer 8
-
£4,026 GBP
View
B+
Retailer 9
-
£4,126 GBP
$5,537 USD
View
B+
Retailer 10
-
£4,241 GBP
$5,692 USD
View
B+
Retailer 11
-
£4,336 GBP
$5,819 USD
View
B+
Retailer 12
-
£4,358 GBP
A$8,998 AUD
View
B+
Retailer 13
-
£4,669 GBP
€5,967 EUR
View
B
Retailer 14
-
£6,573 GBP
View
Most Expensive
B
Queensmith
2557551279 · Oct 28
£6,904 GBP
View
14 more retailers have this diamond
Prices start from £3,090 GBPSave up to £3,813 GBP

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
£3,090 GBP