Not to be pedantic, but a granite boat can and will float if constructed properly. Remember your basic buoyancy, kids. If the boat is mostly hollow it will displace a greater volume than its granite material occupies. Thusly, it will float.
As for musical instruments made of stone, an ocarina can be carefully carved from stone and will sound just fine. Though different stone types will produce slightly different resonance and 'flavor' for the sound.
The boat was probably solid. Rock instruments do exist, I agree. But most aren't solid rock with nothing else... Besides, do dwarves even know HOW to play instruments?
depending on your mods yes or no
Metal boats float, don't they. It's the same principle with stone toy boats.
And I don't see how stone instruments wouldn't work either. With string instruments I think only the frame itself is made out of stone. And with flutes and stuff, so? It still has the holes and such! Same principle as a metal instrument, just a little less shiny.
They do. But I mean, unskilled craft dwarves, I imagine, craft a solid boat. Or a solid instrument, and that was funny to me.
Aah right. Yeah, I can see that.
"Urist, what is this?"
"It's a viola Kivish, what does it look like? A good one too, made of Obsidian and everything!"
"Well, yes, but the strings-"
"Aye, what of them?"
"They're made of Obsidian as well..."
"Aye. What's your point?"