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Cushion|Natural|IGI

0.40ct K SI1 Cushion Natural Diamond

VG • K/SI1 • IGI 749531733

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI 749531733

Diamond specifications and retailer prices

From £155 GBP
As of November 6, 2026
Save £360 GBP (70%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £514 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion sits in the sub-half-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 749531733. Listed at 6 retailers as of November 4, 2026, with prices from £155 to £514, a £360 spread on the same certified stone. MOH London lists it at £514. 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

0.40
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle39.1°
Pavilion angle37.3°
OriginNatural
Grading LabIGI
CertificateIGI 749531733
Dimensions4.16 × 4.05 × 2.87 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Top View
4.16 mm4.05 mm0.40 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 749531733
Side View
Table 62.0%Crown 39.1°Girdle: STK-VTKPavilion 37.3°Culet: NoneDepth 70.9%

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 6
Current: £514 GBP|Low: £155 GBP|High: £530 GBP|Avg: £341 GBP|-3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2£155 GBP
Retailer 4£292 GBP
Retailer 6£320 GBP
Retailer 5£347 GBP
Retailer 3£421 GBP
MOH London£514 GBP

38 data points across 6 retailers

6 retailers£155 GBP to £514 GBP

A
Cheapest Retailer
-
£155 GBP
B+
Retailer 2
-
£292 GBP
View
B+
Retailer 3
-
£320 GBP
View
B+
Retailer 4
-
£347 GBP
View
B
Retailer 5
-
£421 GBP
View
Most Expensive
B
MOH London
71F93C1F3 · Nov 4
£514 GBP
View
5 more retailers have this diamond
Prices start from £155 GBPSave up to £360 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
0.40ct Cushion
£155 GBP