#TBT
From the google: Black sand beaches are formed by the rapid cooling of lava interacting with ocean water or the erosion of heavy, dark minerals. When molten lava enters cold sea water, it shatters into fragments. Over time, these fragments erode into tiny, dense granules of basalt, magnetite, and volcanic glass, resulting in a striking black color.

I guess I have a lot of minerals on my body in these photos then..