CaratHunter
Plans
Cushion|Natural|IGI

0.51ct J SI1 Cushion Natural Diamond

VG • J/SI1 • IGI 720529895

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 720529895

Diamond specifications and retailer prices

From £194 GBP
As of November 6, 2026
Save £410 GBP (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £603 GBP at MOH London · As of November 1, 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 720529895. Listed at 9 retailers as of November 1, 2026, with prices from £194 to £603, a £410 spread on the same certified stone. MOH London lists it at £603. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 720529895
Dimensions9.05 × 4.14 × 2.42 mm
L/W Ratio2.19
Girdle conditionFaceted
Culet sizePointed
Top View
9.05 mm4.14 mm0.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 720529895
Side View
Table 62.0%Crown 31.6°Girdle: THN-STKPavilion 40.3°Culet: NoneDepth 58.5%

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: £603 GBP|Low: £194 GBP|High: £610 GBP|Avg: £376 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£194 GBP
Retailer 3£319 GBP
Retailer 5£347 GBP
Retailer 7£405 GBP
Retailer 6£426 GBP
Retailer 4£480 GBP
MOH London£603 GBP

28 data points across 7 retailers

9 retailers£194 GBP to £603 GBP

A
Cheapest Retailer
-
£194 GBP
Retailer 2
-
£282 GBP
View
Price last confirmed 9 days ago
A
Retailer 3
-
£319 GBP
View
B+
Retailer 4
-
£347 GBP
View
B+
Retailer 5
-
£359 GBP
View
B+
Retailer 6
-
£405 GBP
View
B+
Retailer 7
-
£426 GBP
View
B+
Retailer 8
-
£480 GBP
View
Most Expensive
B
MOH London
48F9D8D51 · Nov 1
£603 GBP
View
8 more retailers have this diamond
Prices start from £194 GBPSave up to £410 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
£194 GBP