Yes, as a general rule. Most of the dripping from air conditioners is just condensed water vapor that comes from the air inside the building. Window air conditioners are designed to drain this water from the back, raining it down on any unsuspecting pedestrians below. In most ways this water is exactly like rain (which also forms from condensed water vapor) or the moisture that collects on a cool can of soda, and it's typically no more harmful.
Basalt is typically made up of augite or feldspar with some silica and olivine. A type of igneous rock, basalt can be found on oceanic floors and terrestrial landscapes formed by lava flows.
Basalt makes up the ocean crust, and hot-spot islands like Hawaii, which is precisely where this sample is from. The sand in the middle is purple-ish due to a high concentration of garnet crystals-commonly found in metamorphic rocks.