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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6551442183

Certificate GIA 6551442183

Diamond specifications and retailer prices

From £2,032 GBP
HK$21,300 HKD
As of November 2, 2026
Save £2,399 GBP (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,431 GBP at MOH London · As of November 1, 2026
View at MOH London

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 6551442183. Listed at 21 retailers as of November 1, 2026, with prices from £2,032 to £4,431, a £2,399 spread on the same certified stone. MOH London lists it at £4,431. 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
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551442183
Dimensions7.24 × 5.79 × 3.98 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
7.24 mm5.79 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551442183
Side View
Table 69.0%CrownGirdle: STK-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: £4,431 GBP|Low: £1,994 GBP|High: £4,801 GBP|Avg: £2,894 GBP|-7.7%
MOH London
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
Retailer 19
November 2, 2026
Retailer 2£2,032 GBP
Retailer 18£2,177 GBP
Retailer 8£2,252 GBP
Retailer 6£2,254 GBP
Retailer 16£2,255 GBP
Retailer 3£2,322 GBP
Retailer 10£2,411 GBP
Retailer 15£2,458 GBP
Retailer 19£2,541 GBP
Retailer 12£2,559 GBP
Retailer 4£2,567 GBP
Retailer 17£2,600 GBP
Retailer 11£2,623 GBP
Retailer 14£3,156 GBP
Retailer 5£3,403 GBP
Retailer 7£3,514 GBP
Retailer 13£3,808 GBP
Retailer 9£4,372 GBP
MOH London£4,431 GBP

19 data points across 19 retailers

21 retailers£2,032 GBP to £4,431 GBP

A
Cheapest Retailer
-
£2,032 GBP
HK$21,300 HKD
A
Retailer 2
-
£2,177 GBP
$2,922 USD
View
A
Retailer 3
-
£2,252 GBP
$3,022 USD
View
A
Retailer 4
-
£2,254 GBP
$3,025 USD
View
A
Retailer 5
-
£2,255 GBP
$3,026 USD
View
Final sale: no returns
A
Retailer 6
-
£2,322 GBP
€2,968 EUR
View
A
Retailer 7
-
£2,411 GBP
$3,235 USD
View
A
Retailer 8
-
£2,458 GBP
$3,299 USD
View
A
Retailer 9
-
£2,541 GBP
$3,410 USD
View
A
Retailer 10
-
£2,559 GBP
View
A
Retailer 11
-
£2,567 GBP
$3,445 USD
View
A
Retailer 12
-
£2,600 GBP
View
Retailer 13
-
£2,623 GBP
$3,520 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
£2,944 GBP
A$6,078 AUD
View
A
Retailer 15
-
£3,156 GBP
€4,034 EUR
View
Retailer 16
-
£3,170 GBP
A$6,545 AUD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
£3,403 GBP
ZAR 73,781 ZAR
View
B+
Retailer 18
-
£3,514 GBP
$4,715 USD
View
B+
Retailer 19
-
£3,808 GBP
$5,110 USD
View
Retailer 20
-
£4,372 GBP
$5,867 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
20437D1FD · Nov 1
£4,431 GBP
View
20 more retailers have this diamond
Prices start from £2,032 GBPSave up to £2,399 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
£2,032 GBP