The Puna’lu Beach Pure black

The bases of the Punalu Beach of Hawaii come from the lava of the local Hawaiian islands: the ejective fiery lava from the volcano encounters the cold sea water, congeals immediately and disintegrates immediately, with the addition of the long time of erosion of the sea water, the lava eventually turns into fine sand. As the lava is rich in magnesium, iron and other mineral substance in deep color, so the sand is in the color of pure black.