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Cushion|Natural|GIA

1.50ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 5543508231

Certificate GIA 5543508231

Diamond specifications and retailer prices

From £4,287 GBP
HK$44,600 HKD
As of October 29, 2026
Save £3,939 GBP (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £8,225 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 E 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 5543508231. Listed at 19 retailers as of October 28, 2026, with prices from £4,287 to £8,225, a £3,939 spread on the same certified stone. Queensmith lists it at £8,225. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5543508231
Dimensions7.65 × 5.88 × 3.99 mm
L/W Ratio1.30
Top View
7.65 mm5.88 mm1.50 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5543508231
Side View
Table 63.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 67.9%

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: Oct 29
Current: £8,225 GBP|Low: £4,287 GBP|High: £8,292 GBP|Avg: £5,891 GBP|+1.2%
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
October 29, 2026
Retailer 3£4,287 GBP
Retailer 8£4,610 GBP
Retailer 14£4,684 GBP
Retailer 7£5,090 GBP
Retailer 5£5,264 GBP
Retailer 12£5,264 GBP
Retailer 2£5,361 GBP
Retailer 9£5,368 GBP
Retailer 15£5,499 GBP
Retailer 6£5,826 GBP
Retailer 4£5,913 GBP
Retailer 11£6,223 GBP
Retailer 13£6,945 GBP
Retailer 10£7,992 GBP
Queensmith£8,225 GBP

22 data points across 15 retailers

19 retailers£4,287 GBP to £8,225 GBP

A
Cheapest Retailer
-
£4,287 GBP
HK$44,600 HKD
A
Retailer 2
-
£4,610 GBP
₹584,615 INR
View
A
Retailer 3
-
£4,684 GBP
$6,237 USD
View
B+
Retailer 4
-
£4,961 GBP
SGD 8,927 SGD
View
Price last confirmed 17 days ago
B+
Retailer 5
-
£5,090 GBP
SGD 9,160 SGD
View
B+
Retailer 6
-
£5,245 GBP
$6,985 USD
View
B+
Retailer 7
-
£5,264 GBP
$7,010 USD
View
B+
Retailer 8
-
£5,264 GBP
$7,010 USD
View
Final sale: no returns
B+
Retailer 9
-
£5,293 GBP
$7,049 USD
View
Price last confirmed 13 days ago
B+
Retailer 10
-
£5,361 GBP
View
B+
Retailer 11
-
£5,368 GBP
View
B+
Retailer 12
-
£5,499 GBP
A$11,266 AUD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£5,807 GBP
A$11,898 AUD
View
B+
Retailer 14
-
£5,826 GBP
$7,759 USD
View
B+
Retailer 15
-
£5,913 GBP
$7,874 USD
View
B+
Retailer 16
-
£6,223 GBP
€7,892 EUR
View
B
Retailer 17
-
£6,945 GBP
ZAR 149,421 ZAR
View
B
Retailer 18
-
£7,992 GBP
View
Most Expensive
B
Queensmith
5543508231 · Oct 28
£8,225 GBP
View
18 more retailers have this diamond
Prices start from £4,287 GBPSave up to £3,939 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
£4,287 GBP