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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6541781711

Certificate GIA 6541781711

Diamond specifications and retailer prices

From £2,490 GBP
HK$26,100 HKD
As of November 2, 2026
Save £2,682 GBP (52%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £5,371 GBP at Wholesale Diamonds Direct · As of October 23, 2026
View at Wholesale Diamonds Direct

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two carat band, graded I 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 6541781711. Listed at 22 retailers as of November 1, 2026, with a 108% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle37.7°
OriginNatural
Grading LabGIA
CertificateGIA 6541781711
Dimensions7.14 × 6.19 × 4.29 mm
L/W Ratio1.15
Top View
7.14 mm6.19 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541781711
Side View
Table 66.0%CrownGirdle: STK-THKPavilion 37.7°Culet: NoneDepth 69.3%

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 2
Current: £2,490 GBP|Low: £2,480 GBP|High: £5,508 GBP|Avg: £3,346 GBP|-5.1%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
Wholesale Diamonds Direct
November 2, 2026
Retailer 1£2,490 GBP
Retailer 9£2,675 GBP
Retailer 3£2,849 GBP
Retailer 17£2,873 GBP
Retailer 7£2,890 GBP
Retailer 8£2,895 GBP
Retailer 16£2,996 GBP
Retailer 14£3,040 GBP
Retailer 11£3,126 GBP
Retailer 10£3,137 GBP
Retailer 2£3,186 GBP
Retailer 5£3,227 GBP
Retailer 13£3,318 GBP
Retailer 6£3,359 GBP
Retailer 15£3,371 GBP
Retailer 12£3,728 GBP
Retailer 4£4,137 GBP
Retailer 18£5,171 GBP
Wholesale Diamonds Direct£5,371 GBP

19 data points across 19 retailers

22 retailers£2,490 GBP to £5,171 GBP

A
Cheapest Retailer
-
£2,490 GBP
HK$26,100 HKD
Retailer 2
-
£2,675 GBP
$3,590 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
£2,849 GBP
€3,641 EUR
View
A
Retailer 4
-
£2,873 GBP
$3,855 USD
View
A
Retailer 5
-
£2,890 GBP
$3,878 USD
View
A
Retailer 6
-
£2,895 GBP
$3,885 USD
View
A
Retailer 7
-
£2,996 GBP
$4,020 USD
View
A
Retailer 8
-
£3,040 GBP
$4,080 USD
View
Final sale: no returns
A
Retailer 9
-
£3,068 GBP
A$6,333 AUD
View
A
Retailer 10
-
£3,126 GBP
View
A
Retailer 11
-
£3,137 GBP
$4,210 USD
View
A
Retailer 12
-
£3,186 GBP
$4,275 USD
View
A
Retailer 13
-
£3,227 GBP
$4,331 USD
View
B+
Retailer 14
-
£3,318 GBP
$4,453 USD
View
B+
Retailer 15
-
£3,359 GBP
$4,507 USD
View
A
Retailer 16
-
£3,371 GBP
View
Retailer 17
-
£3,514 GBP
A$7,255 AUD
View
Price last confirmed 23 days ago
B+
Retailer 18
-
£3,574 GBP
A$7,378 AUD
View
B+
Retailer 19
-
£3,728 GBP
€4,765 EUR
View
B+
Retailer 20
-
£4,137 GBP
ZAR 89,688 ZAR
View
B
Retailer 21
-
£5,171 GBP
View
Most Expensive
Wholesale Diamonds Direct
425984398 · Oct 23
£5,371 GBP
$7,207 USD
View
Price last confirmed 9 days ago
21 more retailers have this diamond
Prices start from £2,490 GBPSave up to £2,682 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
£2,490 GBP