If you picked up a basalt rock which was shaped like a teardrop it could be a

If you picked up a "basalt rock" which was "shaped like a teardrop", it could be a "volcanic bomb".

Explanation:

When there is a volcanic eruption, the pieces of molten magma are thrown into the air. The gravitational force acts on it to pull it down in such a way that while coming down, the pieces take up the shape of a teardrop. These pieces, for the sole reason that they are shaped like a bomb and are erupted out of volcanoes, are called volcanic bombs.

The primarily goals of the zapatistas of mexico in 1994 were land reform and redistribution. it is also included in their demands to have a greater political and cultural autonomy for the indigenous people of chiapas and the rest of mexico.

Don’t use up to much of them it leads to pollution