Mystic Stones in the Mines?

[Rayram Aurean Blue]

Mystic stones are those blue rocks with swirls on them that drop iridium and have a 25% chance to drop a prismatic shard.
I'm trying to see if the wiki is correct on this. It says that mystic stones can be found on levels 100-120, yet, I've never seen a mystic stone in the mines before. I've only seen mystic stones in the Skull Caverns and in the quarry. Can anyone else confirm this? Have any of you seen a mystic stone in the mountain mines?

[Xpliciit]

I'm pretty sure I have seen one in the Mines but it is probably ridiculously rare. Even in Skull Caverns I have only seen a couple.

[Stardustfire]

they can appear but scarce like hell, you have a better chance in the quandry

[Omegatherion]

They are there. Just extremely rare. I maybe found 2 or 3 in my almost 900 hours i have in the game.

[BCD]

I think I even found some above level 100. They're just rare.

[I Kinda Fail]

I got a prismatic shard in the lava mines, not sure what floor though.

[BCD]

You can get them from any enemy after you reach the bottom too, though it's super rare.