Jeopardy: That's not Gneiss

Frankly, I think you’ve all lost your marbles.

This thread would be right at home in a quarry.

These puns serve no porphrys at all.

I certainly have no apatite for them.

I lava good joke, though.

I notice the puns are getting boulder.

I know, they’re getting Moh harder to take.

I’m drowning in an avalanche of these puns.

Ore are they just getting harder to understand? People here can be a bit erratic. I think a couple quartz of beer are called for.

Good idea. I mica known all this talc would make me thirsty.

Many good posts here, but no real gems yet.

These puns rock.

But many diamonds in the rough.

But some leave me coal, even still.

I wish I could come up with a pun, but I can’t and it slate so I’m going to bed.

Sorry, they’re asbestos we can do.

Groan That was terrible! You just couldn’t bring yourself topaz that up, could you? Agate so tired of all these jokes sand puns!

But I guess my complaining is silicas I do it too. I hope I can undo the damage fluorite die.

Graben! And while you’re at the fridge, grab a bunch!

Everybody must get stoned.

Does that mean you rubying here?