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New Specs On Gia Papers


GRI
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I just received a GIA certified diamond today. The paper indicates ST 50% and LH 80%. What do ST and LH refer to? This is the first time that I have noticed these specifications.

 

Thanks in advance for your input.

 

Regards,

GRI

Edited by GRI
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Star Length - the length of the star facets as a % of the total crown width (the star facets are the eight triangle-shaped facets that have as one of their sides one of the sides of the table)

 

Lower Half length - the lenght of the lower girdle facets as a % of the total pavillion length

 

(to be totally precise, they refer to those ratios relative to the projection of the facet on a horizontal line)

 

See this http://www.diamondcut.gia.edu/05_diamond_anatomy.html for diagrams

Edited by davidelevi
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