The main rock minerals I use myself and recommend to others include lava sand, granite sand ... It has an extremely porous texture that helps make soil nutrients more available to plant roots.

newest rock around. When the lava meets the sea, it cools quickly while boiling the ocean into steam. This results in a distinctive texture: the quenching produces a glassy outer surface from the ...

Lava is the form of magma, or molten or semi-molten rock, that erupts to the surface, such as via a volcano or through a crust fracture. We all know lava is pretty hot, but exactly how hot is lava?