12 days ago - HelpfulWalrus - Direct link

Your Mining Luck and skill level both play a part in whether or not you get gems from an ore vein.

That said, precious metal veins (e.g. silver, gold, platinum) are significantly more likely to result in gems than other veins like iron and starmetal.

Orichalcum veins are the exception here, with a drop rate closer to precious metal veins.

12 days ago - HelpfulWalrus - Direct link

Sure!

Under the hood, they both do the same thing, there’s just a small display issue with the tooltips that show the whole-number value instead of the percentage for some items. We’ll get that fixed in a future release!