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Cushion|Natural|GIA

1.50ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6541643501

Certificate GIA 6541643501

Diamond specifications and retailer prices

From £3,525 GBP
HK$36,900 HKD
As of November 1, 2026
Save £3,821 GBP (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £7,346 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541643501. Listed at 21 retailers as of October 28, 2026, with prices from £3,525 to £7,346, a £3,821 spread on the same certified stone. Queensmith lists it at £7,346. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541643501
Dimensions7.86 × 5.86 × 3.95 mm
L/W Ratio1.34
Top View
7.86 mm5.86 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541643501
Side View
Table 67.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.3%

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: £7,346 GBP|Low: £3,496 GBP|High: £7,374 GBP|Avg: £4,852 GBP|+2.2%
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
November 2, 2026
Retailer 14£3,525 GBP
Retailer 10£3,747 GBP
Retailer 4£3,915 GBP
Retailer 8£4,272 GBP
Retailer 6£4,307 GBP
Retailer 11£4,385 GBP
Retailer 9£4,440 GBP
Retailer 5£4,441 GBP
Retailer 3£4,653 GBP
Retailer 7£4,746 GBP
Retailer 2£5,056 GBP
Retailer 13£5,718 GBP
Retailer 12£6,856 GBP
Queensmith£7,346 GBP

23 data points across 14 retailers

21 retailers£3,525 GBP to £7,346 GBP

A
Cheapest Retailer
-
£3,525 GBP
HK$36,900 HKD
A
Retailer 2
-
£3,747 GBP
₹478,131 INR
View
B+
Retailer 3
-
£3,915 GBP
$5,246 USD
View
B+
Retailer 4
-
£4,022 GBP
SGD 7,282 SGD
View
B+
Retailer 5
-
£4,076 GBP
$5,462 USD
View
B+
Retailer 6
-
£4,272 GBP
$5,724 USD
View
Final sale: no returns
B+
Retailer 7
-
£4,307 GBP
SGD 7,798 SGD
View
B+
Retailer 8
-
£4,385 GBP
View
B+
Retailer 9
-
£4,440 GBP
View
B
Retailer 10
-
£4,441 GBP
$5,950 USD
View
B+
Retailer 11
-
£4,478 GBP
$6,000 USD
View
B
Retailer 12
-
£4,653 GBP
$6,235 USD
View
B+
Retailer 13
-
£4,746 GBP
$6,359 USD
View
Retailer 14
-
£4,761 GBP
A$9,815 AUD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
£4,769 GBP
$6,390 USD
View
B+
Retailer 16
-
£4,865 GBP
$6,519 USD
View
B
Retailer 17
-
£5,020 GBP
A$10,348 AUD
View
B+
Retailer 18
-
£5,056 GBP
€6,452 EUR
View
B
Retailer 19
-
£5,718 GBP
ZAR 123,766 ZAR
View
B
Retailer 20
-
£6,856 GBP
View
Most Expensive
B
Queensmith
6541643501 · Oct 28
£7,346 GBP
View
20 more retailers have this diamond
Prices start from £3,525 GBPSave up to £3,821 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
£3,525 GBP