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Cushion|Natural|IGI

1.51ct I SI2 Cushion Natural Diamond

VG • I/SI2 • IGI 729536826

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 729536826

Diamond specifications and retailer prices

From £2,977 GBP
$3,989 USD
As of November 1, 2026
Save £2,461 GBP (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,438 GBP at MOH London · As of November 1, 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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 729536826. Listed at 11 retailers as of November 1, 2026, with prices from £2,977 to £5,438, a £2,461 spread on the same certified stone. MOH London lists it at £5,438. 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
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 729536826
Dimensions10.88 × 6.05 × 3.91 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Top View
10.88 mm6.05 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 729536826
Side View
Table 63.0%Crown 37.5°Girdle: MED-THKPavilion 41.4°Culet: NoneDepth 64.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £5,438 GBP|Low: £2,035 GBP|High: £6,355 GBP|Avg: £3,750 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4£2,035 GBP
Retailer 9£2,977 GBP
Retailer 12£3,015 GBP
Retailer 11£3,043 GBP
Retailer 10£3,151 GBP
Retailer 2£3,330 GBP
Retailer 6£3,387 GBP
Retailer 7£3,414 GBP
Retailer 8£3,526 GBP
Retailer 5£3,863 GBP
MOH London£5,438 GBP
Retailer 3£6,355 GBP

13 data points across 12 retailers

11 retailers£2,977 GBP to £5,438 GBP

B+
Cheapest Retailer
-
£2,977 GBP
$3,989 USD
B+
Retailer 2
-
£3,015 GBP
$4,040 USD
View
B+
Retailer 3
-
£3,043 GBP
$4,077 USD
View
B+
Retailer 4
-
£3,151 GBP
$4,222 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,330 GBP
View
B+
Retailer 6
-
£3,387 GBP
$4,538 USD
View
B+
Retailer 7
-
£3,414 GBP
$4,575 USD
View
B+
Retailer 8
-
£3,414 GBP
$4,575 USD
View
B+
Retailer 9
-
£3,526 GBP
$4,724 USD
View
B+
Retailer 10
-
£3,863 GBP
€4,930 EUR
View
Most Expensive
B
MOH London
B4A56073B · Nov 1
£5,438 GBP
View
10 more retailers have this diamond
Prices start from £2,977 GBPSave up to £2,461 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.

B+
1.51ct Cushion
£2,977 GBP