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Cushion|Natural|IGI

0.51ct J SI1 Cushion Natural Diamond

VG • J/SI1 • IGI 749531713

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

Certificate IGI 749531713

Diamond specifications and retailer prices

From £216 GBP
As of November 6, 2026
Save £475 GBP (69%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £691 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 749531713. Listed at 7 retailers as of November 4, 2026, with prices from £216 to £691, a £475 spread on the same certified stone. MOH London lists it at £691. 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

0.51
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.1°
Pavilion angle31.6°
OriginNatural
Grading LabIGI
CertificateIGI 749531713
Dimensions4.48 × 4.39 × 2.89 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizeNone
Top View
4.48 mm4.39 mm0.51 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 749531713
Side View
Table 63.0%Crown 34.1°Girdle: STK-VTKPavilion 31.6°Culet: NoneDepth 65.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £691 GBP|Low: £216 GBP|High: £717 GBP|Avg: £446 GBP|-3.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£216 GBP
Retailer 6£397 GBP
Retailer 4£402 GBP
Retailer 7£415 GBP
Retailer 5£464 GBP
Retailer 3£539 GBP
MOH London£691 GBP

41 data points across 7 retailers

7 retailers£216 GBP to £691 GBP

A
Cheapest Retailer
-
£216 GBP
B+
Retailer 2
-
£397 GBP
View
B+
Retailer 3
-
£402 GBP
View
B+
Retailer 4
-
£415 GBP
View
B+
Retailer 5
-
£464 GBP
View
B
Retailer 6
-
£539 GBP
View
Most Expensive
B
MOH London
DB7F122AF · Nov 4
£691 GBP
View
6 more retailers have this diamond
Prices start from £216 GBPSave up to £475 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
0.51ct Cushion
£216 GBP