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Cushion|Natural|GIA

1.50ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 5543750463

Certificate GIA 5543750463

Diamond specifications and retailer prices

From £3,582 GBP
HK$37,500 HKD
As of November 1, 2026
Save £3,820 GBP (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,403 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 D 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 5543750463. Listed at 19 retailers as of October 28, 2026, with prices from £3,582 to £7,403, a £3,820 spread on the same certified stone. Queensmith lists it at £7,403. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5543750463
Dimensions7.38 × 5.80 × 3.97 mm
L/W Ratio1.27
Top View
7.38 mm5.80 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543750463
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.5%

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: £7,403 GBP|Low: £3,554 GBP|High: £7,459 GBP|Avg: £4,957 GBP|+1.8%
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 1, 2026
Retailer 11£3,582 GBP
Retailer 2£3,828 GBP
Retailer 13£4,000 GBP
Retailer 5£4,220 GBP
Retailer 3£4,361 GBP
Retailer 7£4,421 GBP
Retailer 9£4,532 GBP
Retailer 6£4,703 GBP
Retailer 4£4,842 GBP
Retailer 14£4,936 GBP
Retailer 12£5,163 GBP
Retailer 10£5,805 GBP
Retailer 8£6,961 GBP
Queensmith£7,403 GBP

23 data points across 14 retailers

19 retailers£3,582 GBP to £7,403 GBP

A
Cheapest Retailer
-
£3,582 GBP
HK$37,500 HKD
A
Retailer 2
-
£3,828 GBP
₹488,481 INR
View
A
Retailer 3
-
£4,000 GBP
$5,360 USD
View
Retailer 4
-
£4,112 GBP
SGD 7,446 SGD
View
Price last confirmed 18 days ago
A
Retailer 5
-
£4,220 GBP
SGD 7,641 SGD
View
A
Retailer 6
-
£4,361 GBP
$5,843 USD
View
Final sale: no returns
A
Retailer 7
-
£4,388 GBP
$5,879 USD
View
A
Retailer 8
-
£4,388 GBP
$5,880 USD
View
A
Retailer 9
-
£4,421 GBP
View
A
Retailer 10
-
£4,532 GBP
View
Retailer 11
-
£4,703 GBP
A$9,695 AUD
View
Price last confirmed 22 days ago
Retailer 12
-
£4,758 GBP
$6,375 USD
View
Price last confirmed 16 days ago
B+
Retailer 13
-
£4,842 GBP
$6,488 USD
View
B+
Retailer 14
-
£4,855 GBP
A$10,008 AUD
View
B+
Retailer 15
-
£4,936 GBP
$6,614 USD
View
B+
Retailer 16
-
£5,163 GBP
€6,588 EUR
View
B+
Retailer 17
-
£5,805 GBP
ZAR 125,655 ZAR
View
B+
Retailer 18
-
£6,961 GBP
View
Most Expensive
B
Queensmith
5543750463 · Oct 28
£7,403 GBP
View
18 more retailers have this diamond
Prices start from £3,582 GBPSave up to £3,820 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
£3,582 GBP