Well I sometimes try to destroy my creation with earthquake but I just don't know hot to make one. so... I suggested. (Make enable or disable earthquake simulation)
Some kind of breakable concrete would be nice, like breakable metal, and it breaks into stone.
BRICK [BRCK]
Its under SOLIDS , it should be a dark redish color .
Properties: I don't really know the pressure that breaks the BMTL, but the resistance should be triple at least. It should melt into Lava at 3000 C. If broken by pressure it should leave behind low amounts of Concrete and some Stone.
We really don't have a proper Building material. BMTL, GOO or WOOD ain't really construction materials. BMTL will conduct electricity, let not even talk about the Broken metal... , GOO just goes away and its not realistic and Wood burns, witch will light up pretty much the whole simulation.