Talk:Sentirum/@comment-76.5.58.243-20171201103524/@comment-72.24.169.196-20180804180312

Actually the thing about the 5% is true Source is the Mining page on the wiki here

http://warframe.wikia.com/wiki/Mining

" Additionally, the Advanced Nosam Cutter has a minimap radar and - depending on the quality of the cut - a 15% ~ 30% chance of extracting an Eidolon Gem (Sentirum or Nyth). "

Keeping a clean cut does indeed increase your chances for the Eidolon gems.