Jump to content

New Specs On Gia Papers


Recommended Posts

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.




Edited by GRI
Link to comment
Share on other sites

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
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...