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Radiant|Natural|IGI

0.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • IGI 741597007

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 741597007

Diamond specifications and retailer prices

From £176 GBP
As of November 6, 2026
Save £389 GBP (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £566 GBP at MOH London · As of November 7, 2026
View at MOH London

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 741597007. Listed at 6 retailers as of November 6, 2026, with prices from £176 to £566, a £389 spread on the same certified stone. MOH London lists it at £566. 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
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle46.1°
Pavilion angle32.5°
OriginNatural
Grading LabIGI
CertificateIGI 741597007
Dimensions5.02 × 3.89 × 2.88 mm
L/W Ratio1.29
Culet sizePointed
Top View
5.02 mm3.89 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 741597007
Side View
Table 63.0%Crown 46.1°Girdle: ThickPavilion 32.5°Culet: NoneDepth 74.0%

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: £566 GBP|Low: £176 GBP|High: £576 GBP|Avg: £371 GBP|-1.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3£176 GBP
Retailer 2£326 GBP
Retailer 6£344 GBP
Retailer 5£382 GBP
Retailer 4£456 GBP
MOH London£566 GBP

39 data points across 6 retailers

6 retailers£176 GBP to £566 GBP

A
Cheapest Retailer
-
£176 GBP
B+
Retailer 2
-
£326 GBP
View
B+
Retailer 3
-
£344 GBP
View
B+
Retailer 4
-
£382 GBP
View
B
Retailer 5
-
£456 GBP
View
Most Expensive
B
MOH London
54919E442 · Nov 7
£566 GBP
View
5 more retailers have this diamond
Prices start from £176 GBPSave up to £389 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 Radiant
£176 GBP