What is Star/Upper Girdle Ratio?

[marktran]

Does anyone know what "Star/Upper Girdle Ratio" is and what the value of 48/52 mean for round diamond?

 

[pyramid]

Just a consumer here but I think it may mean the proportional measurement of the crown depth which is occupied between the star facet and upper girdle facet, the measurement 48/52 may be the average of the eight star/girdle facets around the crown. e.g. 48% of crown depth occupied by star and 52% depth occupied by upper girdle facet. Therefore the points on the star facets would be nearly halfway down the crown.

One of the experts will be able to help you though regarding whether this is considered good proportions.

 

[pyramid]

Sorry marktran, just noticed this is your first post on pricescope. A warm welcome to you, hope you stick around and ask more questions so that we can all learn. There is a wealth of knowledge on this forum.

 

[marktran]

Thanks for the warm welcome and our answer.