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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 6555305528

Certificate GIA 6555305528

Diamond specifications and retailer prices

From £3,033 GBP
$4,070 USD
As of November 1, 2026
Save £3,398 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,431 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6555305528. Listed at 20 retailers as of November 1, 2026, with prices from £3,033 to £6,431, a £3,398 spread on the same certified stone. MOH London lists it at £6,431. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555305528
Dimensions7.40 × 5.68 × 4.14 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.40 mm5.68 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555305528
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 72.8%

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 1
Current: £6,431 GBP|Low: £2,999 GBP|High: £6,586 GBP|Avg: £4,022 GBP|-2.4%
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
November 2, 2026
Retailer 3£3,033 GBP
Retailer 12£3,033 GBP
Retailer 18£3,198 GBP
Retailer 9£3,363 GBP
Retailer 16£3,376 GBP
Retailer 4£3,379 GBP
Retailer 6£3,407 GBP
Retailer 10£3,465 GBP
Retailer 2£3,568 GBP
Retailer 15£3,618 GBP
Retailer 11£3,629 GBP
Retailer 13£3,831 GBP
Retailer 17£3,939 GBP
Retailer 7£3,955 GBP
Retailer 14£4,568 GBP
Retailer 5£4,992 GBP
Retailer 8£6,308 GBP
MOH London£6,431 GBP

19 data points across 18 retailers

20 retailers£3,033 GBP to £6,431 GBP

A
Cheapest Retailer
-
£3,033 GBP
$4,070 USD
A
Retailer 2
-
£3,033 GBP
HK$31,800 HKD
View
B+
Retailer 3
-
£3,198 GBP
$4,291 USD
View
B+
Retailer 4
-
£3,363 GBP
$4,513 USD
View
B+
Retailer 5
-
£3,376 GBP
$4,530 USD
View
Final sale: no returns
B+
Retailer 6
-
£3,379 GBP
€4,319 EUR
View
B+
Retailer 7
-
£3,407 GBP
$4,572 USD
View
B+
Retailer 8
-
£3,465 GBP
$4,650 USD
View
B+
Retailer 9
-
£3,568 GBP
A$7,366 AUD
View
B+
Retailer 10
-
£3,618 GBP
$4,855 USD
View
B+
Retailer 11
-
£3,629 GBP
$4,870 USD
View
B+
Retailer 12
-
£3,831 GBP
View
B
Retailer 13
-
£3,937 GBP
A$8,128 AUD
View
B+
Retailer 14
-
£3,939 GBP
View
B
Retailer 15
-
£3,955 GBP
$5,307 USD
View
Retailer 16
-
£4,116 GBP
A$8,498 AUD
View
Price last confirmed 24 days ago
B
Retailer 17
-
£4,568 GBP
€5,838 EUR
View
B
Retailer 18
-
£4,992 GBP
ZAR 108,223 ZAR
View
Retailer 19
-
£6,308 GBP
$8,464 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
5528D845F · Nov 2
£6,431 GBP
View
19 more retailers have this diamond
Prices start from £3,033 GBPSave up to £3,398 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
1.51ct Cushion
£3,033 GBP