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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1553442255

Certificate GIA 1553442255

Diamond specifications and retailer prices

From £2,718 GBP
HK$28,500 HKD
As of November 2, 2026
Save £3,023 GBP (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £5,749 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 1553442255. Listed at 21 retailers as of November 2, 2026, with a 111% 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
OriginNatural
Grading LabGIA
CertificateGIA 1553442255
Dimensions7.50 × 5.99 × 4.12 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
7.50 mm5.99 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553442255
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.8%

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: £5,742 GBP|Low: £2,680 GBP|High: £6,073 GBP|Avg: £3,647 GBP|-5.5%
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 14£2,718 GBP
Retailer 4£2,724 GBP
Retailer 3£2,862 GBP
Retailer 18£3,014 GBP
Retailer 5£3,049 GBP
Retailer 9£3,084 GBP
Retailer 7£3,099 GBP
Retailer 10£3,156 GBP
Retailer 11£3,220 GBP
Retailer 17£3,256 GBP
Retailer 12£3,286 GBP
Retailer 15£3,421 GBP
Retailer 13£3,457 GBP
Retailer 2£3,585 GBP
Retailer 8£3,601 GBP
Retailer 16£4,078 GBP
Retailer 6£4,520 GBP
Retailer 1£5,742 GBP
Wholesale Diamonds Direct£5,749 GBP

19 data points across 19 retailers

21 retailers£2,718 GBP to £5,742 GBP

A
Cheapest Retailer
-
£2,718 GBP
HK$28,500 HKD
A
Retailer 2
-
£2,724 GBP
$3,655 USD
View
A
Retailer 3
-
£2,862 GBP
$3,841 USD
View
A
Retailer 4
-
£3,014 GBP
$4,045 USD
View
Final sale: no returns
A
Retailer 5
-
£3,049 GBP
€3,897 EUR
View
A
Retailer 6
-
£3,084 GBP
$4,139 USD
View
A
Retailer 7
-
£3,099 GBP
$4,159 USD
View
A
Retailer 8
-
£3,156 GBP
$4,235 USD
View
A
Retailer 9
-
£3,220 GBP
A$6,649 AUD
View
A
Retailer 10
-
£3,256 GBP
$4,370 USD
View
A
Retailer 11
-
£3,286 GBP
$4,410 USD
View
A
Retailer 12
-
£3,421 GBP
View
A
Retailer 13
-
£3,457 GBP
$4,639 USD
View
B+
Retailer 14
-
£3,585 GBP
View
Retailer 15
-
£3,601 GBP
$4,832 USD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
£3,763 GBP
A$7,768 AUD
View
Retailer 17
-
£3,827 GBP
A$7,901 AUD
View
Price last confirmed 23 days ago
B+
Retailer 18
-
£4,078 GBP
€5,212 EUR
View
B+
Retailer 19
-
£4,520 GBP
ZAR 97,981 ZAR
View
B
Retailer 20
-
£5,742 GBP
View
Most Expensive
Wholesale Diamonds Direct
253138994 · Oct 23
£5,749 GBP
$7,715 USD
View
Price last confirmed 10 days ago
20 more retailers have this diamond
Prices start from £2,718 GBPSave up to £3,023 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
£2,718 GBP