*with both Cetus variants. Have yet to try if the drill has different result.
I did 2 sets of ~3 hour mining expeditions (solo exploration) without being able to find tier 3 gems (zodians or thysts). And btw: The 1 'pip' in the 'rare/special mining opportunity' is too small - 2 seems more adequate. Nvm - too stupid to equip the 'right' tool.