Wot Rocks Are These?

[zephyr]

hey everyone, long time i havent posted
im willing to redo my fishtank and im interested these rocks

does anyone know the name of these rocks and how much they may cost me?

 

[avirex]

hmmm kinda looks like petrified wood... im that in my tank and kind looks similiar

im almost70 percent sure im wrong though

 

[Opcn]

Well chosen ones.

I see viens of quartz in them so I'm going to say I don't know but its from deep.

The thing is, what makes those rocks so nice is that they show signs of errosion in patters that are typically seen only on much larger rocks, I doubt you could ever find some like that in any normal fish shop in a thousand years. In the states we have something called lace rock from quarries in southern Utah, but I'm not sure what you could get in Australia.

 

[jarmado]

artificial rocks?